ALTSTONE RIN #3000 [English ver.] Includes English manual No Soaking Needed – High-Density Ceramic Whetstone "RIN" Always ready to use. Thanks to its non-absorbent nature, "RIN" allows you to start sharpening immediately—no soaking, no waiting. 【Set Includes】 - Whetstone - Nagura stone - Compact anti-slip mat 【Firm Type】 A hard-type stone that delivers reliable sharpening. Balanced for both hardness and cutting performance. 【Made in Japan】 Japanese-made ceramic whetstone. We work with domestic factories to manage everything from planning to delivery, ensuring top quality at a reasonable price. 【#3000 Grit – Smooth Finish with Enhanced Sharpness】 Step up your edge with a #3000 finishing stone. It's perfect for removing micro-scratches from medium grits and gives your knife a noticeably sharper feel. Recommended for first-time finishers. 【High Abrasive Power】 Packed with high-density WA (white aluminum oxide) abrasives, it offers excellent metal removal. Even beginners can clearly feel the knife getting sharper as metal is shaved away. 【Compatible Steels】 Suitable for common household stainless steel knives and even high-hardness carbon steel (hagane) blades. Note: Not compatible with non-metal blades such as ceramic or special materials like titanium. 【Anti-Slip Mat Included】 Comes with a compact anti-slip mat so you can sharpen safely even on stainless kitchen countertops. The mat’s rubber material was carefully selected from dozens of options for maximum grip. Ideal for users without a dedicated whetstone base. 【Thorough Quality Control】 All stones undergo double inspection—first by the manufacturer, then by us—to ensure only flawless products are shipped. 【Specifications】 Grit:  Main Stone: #3000 / Nagura: #3000 Size:  Main Stone: 180 × 60 × 20 mm (7.1 × 2.4 × 0.8 inches)  Nagura: 28 × 60 × 20 mm (1.1 × 2.4 × 0.8 inches) Weight:  Main Stone: 520 g (18.3 oz)  Nagura: 70 g (2.5 oz) Water Absorption: None – use it dry without soaking. Make your everyday cooking more enjoyable. A sharper knife transforms the way you cook. If this product interests you, click "Add to Cart" and get started today.

ALTSTONE RIN #1000 #3000 set [English ver.] Includes English manual No Soaking Needed – High-Density Ceramic Whetstone "RIN" Always ready to use. Thanks to its non-absorbent nature, "RIN" allows you to start sharpening immediately—no soaking, no waiting. 【Set Includes】 - Whetstone - Nagura stone - Compact anti-slip mat 【Firm Type】 A hard-type stone that delivers reliable sharpening. Balanced for both hardness and cutting performance. 【Made in Japan】 Japanese-made ceramic whetstone. We work with domestic factories to manage everything from planning to delivery, ensuring top quality at a reasonable price. 【#1000 Grit – Your Go-To for Everyday Sharpening】 This is the essential grit for general sharpening. A slightly dulled kitchen knife can be revived easily with #1000. In fact, many home cooks find #1000 sufficient as a finishing stone. If you're buying your first whetstone, #1000 is the ideal choice. 【#3000 Grit – Smooth Finish with Enhanced Sharpness】 Step up your edge with a #3000 finishing stone. It's perfect for removing micro-scratches from medium grits and gives your knife a noticeably sharper feel. Recommended for first-time finishers. 【High Abrasive Power】 Packed with high-density WA (white aluminum oxide) abrasives, it offers excellent metal removal. Even beginners can clearly feel the knife getting sharper as metal is shaved away. 【Compatible Steels】 Suitable for common household stainless steel knives and even high-hardness carbon steel (hagane) blades. Note: Not compatible with non-metal blades such as ceramic or special materials like titanium. 【Anti-Slip Mat Included】 Comes with a compact anti-slip mat so you can sharpen safely even on stainless kitchen countertops. The mat’s rubber material was carefully selected from dozens of options for maximum grip. Ideal for users without a dedicated whetstone base. 【Thorough Quality Control】 All stones undergo double inspection—first by the manufacturer, then by us—to ensure only flawless products are shipped. 【Specifications】 Grit:  Main Stone: #1000 / Nagura: #1000  Main Stone: #3000 / Nagura: #3000 Size:  Main Stone: 180 × 60 × 20 mm (7.1 × 2.4 × 0.8 inches)  Nagura: 28 × 60 × 20 mm (1.1 × 2.4 × 0.8 inches) Weight:  Main Stone: 520 g (18.3 oz)  Nagura: 70 g (2.5 oz) Water Absorption: None – use it dry without soaking. 【Shipping】 Free shipping within Japan. Shipping method will be determined based on inventory and whether items are bundled. Make your everyday cooking more enjoyable. A sharper knife transforms the way you cook. If this product interests you, click "Add to Cart" and get started today.

Experience the smoothness of superb sharpening. Never deforming or degrading, the “Gokumyo” is our ultimate whetstone. The “Suehiro Gokumyo Series” is made with our unique combination of ultra-fine abrasives, and binders. Our fired ceramic whetstones, while taking full advantage of the properties of ultra-fine abrasives, overcome the drawbacks of conventional natural and resin based whetstones, which could lose their hardness due to temperature changes, or when immersed in water, and which could suffer surface degradation and cracking. The abrasives have been enhanced from #13,000 (1.0 micron) to #20,000 (0.5 micron), resulting in a whetstone giving a smooth, superbly sharp edge, far exceeding the synthetic stones which came before. Enjoy the experience of superb refinement and sharpening. --- English ------ [GMN200] - Product No. GMN200 - Super Fine Finishing Whetstone grit ＃20000 - Whetstone Size 205×73×19~21mm - Package Size 312×108×45mm - Appr. 1200〜1250g - Whetstone Surface Restorer, “Dual Cleaner” (Included) - JAN Code 4966684072121 *Please note that the whetstone size may differ slightly from the dimensions listed due to the characteristics of the manufacturing method and post-processing. *Please note that we may change materials and colors without prior notice due to improvements and material cost fluctuations, etc. [Usage Instructions:] This well-made whetstone has a dense concentration of ultra-fine air pockets and can be used immediately by lightly wetting it. Before using the whetstone, either briefly submerge it in water, or wet the surface with your hand, then begin sharpening. Under normal circumstances (summer or winter temperature variations, immersion in water), there is no risk of a loss of quality. It can be used in the same manner as conventional (kiln-fired) whetstones. * To maintain the stone’s ability to sharpen, please clean the whetstone with water and restore the surface with the restoration stone included in the set after each use.

CERAX Series The CERAX series offers a full lineup from ultra-fine finishing stones to coarse-medium stones. Designed for professional craftsmen as well as home users who want to start sharpening seriously, these stones can be used for all types of blades—from kitchen knives to woodworking tools, hatchets, and outdoor knives. [#1000 Medium Grit] Perfect for medium sharpening of knives such as Deba, Yanagiba, and Gyuto. This #1000 medium whetstone comes in the convenient No.1 size with a rubber frame, making it easy to use both for professional kitchens and at home. Specifications Model No.: 1010 Medium Grit Whetstone #1000 (WA) Stone Size: 205 × 73 × 29 mm (8.07" × 2.87" × 1.14") Weight: approx. 1000 g (35.27 oz) JAN Code: 4966684080027 Includes a flattening/cleaning stone for surface maintenance

FUKAMI – Pro Power. Perfectly Compact for Home Use Sharpen like a pro — without the bulk. Engineered for smooth, powerful sharpening at home. ALTSTONE FUKAMI #1000 / #8000 Dual Grit Ceramic Whetstone Set with Nagura – Japanese-made soaking-type sharpening stones for kitchen knives. Ideal for stainless steel and high-carbon blades. Compact, high-performance set for everyday sharpening needs. ALTSTONE FUKAMI Whetstone Set #1000 & #8000 with Nagura | Made in Japan Medium & Super Fine Grit Ceramic Sharpening Stones for Kitchen Knives This high-quality whetstone set includes a #1000 medium sharpening stone and a #8000 super fine finishing stone. Made in Japan using the vitrified firing method, it ensures professional-level sharpening results at home. [Features] High Grinding Power: High concentration WA abrasives provide strong sharpening capability, even for beginners. Versatile Compatibility: Suitable for stainless steel and high-hardness steel knives. (Not for ceramic/titanium.) Non-Slip Mat Included: Sharpen safely without a stand. Double Inspection: Each item is checked both at the factory and in-house before shipping. [Specifications] FUKAMI1000 Grit: #1000 (medium) - Size: 7.1" × 2.4" × 0.8" (18cm × 6cm × 2cm) - Weight: 15.17oz (430g) - Type: Soaking - Material: Ceramic (vitrified) - FUKAMI8000 Grit: #8000 (super fine) - Size: 7.1" × 2.4" × 0.8" (18cm × 6cm × 2cm) - Weight: 15.17oz (430g) - Type: Soaking - Material: Ceramic (vitrified) - Nagura Size: 2.4" × 1.1" × 0.8" Weight: 2.47os (70g) Planned by ALTWAYS.LLC and proudly manufactured in Japan. ALTSTONE: Japanese Craft, Modern Edge In Japan, sharpening blades has never been just the work of professionals. For many years, people have used whetstones at home to keep their kitchen knives sharp—it’s a tradition deeply rooted in daily life. This culture has shaped the evolution of Japanese whetstones themselves. Brands like Shapton, King, Naniwa, and Suehiro have each developed their own technologies and philosophies, refining bonding methods, abrasive design, and sharpening feel. Japan has developed a particularly rich and refined sharpening culture. Few other countries offer such a wide variety of products tailored to different blade types, with such careful attention to sharpening feel and finish. In terms of materials, structure, and craftsmanship, Japanese sharpening stones continue to set a high standard globally. ALTSTONE offers products that reflect the refinement and subtlety of Japan’s sharpening culture. For example, our FUKAMI series is designed to handle a wide variety of blades—from stainless steel kitchen knives and carbon steel blades to blades with curved edges, like kitchen knives, and compact utility knives. By carefully selecting specifications such as hardness and surface texture, we aim to ensure a smooth and satisfying sharpening experience. Whether you’re just starting out or already familiar with sharpening, we focus on offering stones that are easy to use—yet precise enough that you can clearly feel the difference in sharpness after each session. Sharpening may not be flashy. But there’s something quietly special about the meal you prepare with a freshly sharpened blade. We hope that an ALTSTONE whetstone can be part of that small but meaningful change in your everyday cooking. How to Sharpen with ALTSTONE ▶ Watch our sharpening tutorial: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

Experience the smoothness of superb sharpening. Never deforming or degrading, the “Gokumyo” is our ultimate whetstone. The “Suehiro Gokumyo Series” is made with our unique combination of ultra-fine abrasives, and binders. Our fired ceramic whetstones, while taking full advantage of the properties of ultra-fine abrasives, overcome the drawbacks of conventional natural and resin based whetstones, which could lose their hardness due to temperature changes, or when immersed in water, and which could suffer surface degradation and cracking. The abrasives have been enhanced from #13,000 (1.0 micron) to #20,000 (0.5 micron), resulting in a whetstone giving a smooth, superbly sharp edge, far exceeding the synthetic stones which came before. Enjoy the experience of superb refinement and sharpening. GMN150 Product No. GMN150 Super Fine Finishing Whetstone grit ＃15000 Whetstone Size 205×73×19~21mm Package Size 312×108×45mm Appr. 1200〜1250g Whetstone Surface Restorer, “Dual Cleaner” (Included) JAN Code 4966684072114 *Please note that the whetstone size may differ slightly from the dimensions listed due to the characteristics of the manufacturing method and post-processing. *Please note that we may change materials and colors without prior notice due to improvements and material cost fluctuations, etc. Usage Instructions: This well-made whetstone has a dense concentration of ultra-fine air pockets and can be used immediately by lightly wetting it. Before using the whetstone, either briefly submerge it in water, or wet the surface with your hand, then begin sharpening. Under normal circumstances (summer or winter temperature variations, immersion in water), there is no risk of a loss of quality. It can be used in the same manner as conventional (kiln-fired) whetstones. * To maintain the stone’s ability to sharpen, please clean the whetstone with water and restore the surface with the restoration stone included in the set after each use.

ALTSTONE RIN #1000 & #5000 set [English ver.] Includes English manual RIN – High Density. Precise Edge. Compact Form. Hard & Dense Ceramic Whetstone Set for Medium & Finishing (#1000 / #5000) with Nagura ALTSTONE RIN whetstone set includes a #1000 medium grit and a #5000 finishing stone. These Japanese-made ceramic sharpening stones offer professional-level sharpening at home with Splash & Go convenience. [Features] High Grinding Power: WA abrasives deliver consistent sharpening performance with dense ceramic construction. Versatile Application: Effective for both stainless and high-hardness steel kitchen knives. Non-Slip Mat Included: Ensures safe and stable sharpening without a whetstone stand. Thorough Inspection: Each item is quality-checked by both manufacturer and seller before shipping. [Specifications] RIN is ALTSTONE's Hard/Dense type whetstone. ✅RIN1000 – Medium Sharpening Stone Grit: #1000 (Medium) Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") Nagura: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") Weight: 430g (Main) / 70g (Nagura) Type: Splash & Go (No soaking required) ✅RIN5000 – Finishing Sharpening Stone Grit: #5000 (Finishing) Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8"), Compact size ideal for home use. Nagura: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") Weight: 520g (Main) / 70g (Nagura) Type: Splash & Go (No soaking required) Planned by ALTWAYS.LLC and proudly manufactured in Japan. ALTSTONE: Precision-engineered in Japan In Japan, sharpening blades has never been just the work of professionals. For many years, people have used whetstones at home to keep their kitchen knives sharp—it’s a tradition deeply rooted in daily life. This culture has shaped the evolution of Japanese sharpening stones themselves. Brands like Shapton, King, Naniwa, and Suehiro have each developed their own technologies and philosophies, refining bonding methods, abrasive design, and sharpening feel. Japan has developed a particularly rich and refined sharpening culture. Few other countries offer such a wide variety of products tailored to different blade types, with such careful attention to sharpening feel and finish. In terms of materials, structure, and craftsmanship, Japanese sharpening stones continue to set a high standard globally. ALTSTONE offers products that reflect the refinement and subtlety of Japan’s sharpening culture. For example, our RIN series is engineered for durability and performance, featuring a hard and densely compacted structure that resists wear and maintains flatness over time. RIN achieves a high-level balance of hardness and cutting power through optimized bonding techniques and surface treatment, making it well-suited for tasks that demand precision and clean finishing. Sharpening may not be flashy. But there’s something quietly special about the meal you prepare with a freshly sharpened blade. We hope that an ALTSTONE whetstone can be part of that small but meaningful change in your everyday cooking. How to Sharpen a Knife with ALTSTONE ▶ Watch our sharpening tutorial on YouTube: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

ALTSTONE RIN #1000 #5000 #10000 set [English ver.] Includes English manual 　 　Note: This set does not include a nagura stone. No Soaking Needed – High-Density Ceramic Whetstone "RIN" Always ready to use. Thanks to its non-absorbent nature, "RIN" allows you to start sharpening immediately—no soaking, no waiting. 【Set Includes】 - Whetstone - Nagura stone - Compact anti-slip mat 【Firm Type】 A hard-type stone that delivers reliable sharpening. Balanced for both hardness and cutting performance. 【Made in Japan】 Japanese-made ceramic whetstone. We work with domestic factories to manage everything from planning to delivery, ensuring top quality at a reasonable price. 【#1000 Grit – Your Go-To for Everyday Sharpening】 This is the essential grit for general sharpening. A slightly dulled kitchen knife can be revived easily with #1000. In fact, many home cooks find #1000 sufficient as a finishing stone. If you're buying your first whetstone, #1000 is the ideal choice. 【#5000 Grit – A Step Up for Sharper Edges】 Ideal for those who seek even greater sharpness. #5000 provides a refined finish that enhances cutting performance beyond basic sharpening. 【#10000 Grit – Ultra-Fine Finish for Precision Edges】 Designed for ultimate edge refinement. #10000 is perfect for achieving an exceptionally smooth, razor-sharp blade for delicate tasks. 【High Abrasive Power】 Packed with high-density WA (white aluminum oxide) abrasives, it offers excellent metal removal. Even beginners can clearly feel the knife getting sharper as metal is shaved away. 【Compatible Steels】 Suitable for common household stainless steel knives and even high-hardness carbon steel (hagane) blades. Note: Not compatible with non-metal blades such as ceramic or special materials like titanium. 【Anti-Slip Mat Included】 Comes with a compact anti-slip mat so you can sharpen safely even on stainless kitchen countertops. The mat’s rubber material was carefully selected from dozens of options for maximum grip. Ideal for users without a dedicated whetstone base. 【Thorough Quality Control】 All stones undergo double inspection—first by the manufacturer, then by us—to ensure only flawless products are shipped. 【Specifications】 Grit:  #1000, #5000, #10000 Size:  180 × 60 × 20 mm (7.1 × 2.4 × 0.8 inches) Weight:  Main Stone: 520 g (18.3 oz)  Nagura: 70 g (2.5 oz) Water Absorption: None – use it dry without soaking. 【Shipping】 - Free shipping within Japan. Shipping method will be determined based on inventory and whether items are bundled. - Shipping outside Japan varies by region. Please add the item to your cart and check the shipping details at checkout. Make your everyday cooking more enjoyable. A sharper knife transforms the way you cook. If this product interests you, click "Add to Cart" and get started today.

ALTSTONE FUKAMI #300 #1000 #3000 set [English ver.] Includes English manual 　Note: This set does not include a nagura stone. FUKAMI – Pro Power. Perfectly Compact for Home Use ✅ Full-stage sharpening set — powerful, smooth-cutting, and perfectly sized for home use. Made in Japan. ALTSTONE FUKAMI Sharpening Stone Set #300 #1000 #3000 | Japanese Ceramic Whetstone This professional-grade sharpening stone set from ALTSTONE includes three premium ceramic whetstones: a #300 coarse stone, #1000 medium grit, and a #3000 finishing stone. Perfect for restoring, refining, and polishing kitchen knives and tools. Proudly made in Japan using the high-performance vitrified bonding method. [Features] High Grinding Power: WA abrasives provide consistent sharpening for both beginners and professionals. Versatile Blade Compatibility: Effective on stainless and high-hardness steel knives (not for ceramic or titanium). Non-Slip Mat Included: Adds safety and stability during sharpening. Reliable Japanese Quality: Each stone is inspected by both the factory and seller prior to shipping. [Specifications] FUKAMI #300 Coarse Sharpening Stone - Grit: #300 (Coarse) - Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Weight: Main 430g - Type: Soaking - Material: Ceramic (Vitrified) FUKAMI #1000 Medium Sharpening Stone - Grit: #1000 (Medium) - Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Weight: Main 430g - Type: Soaking - Material: Ceramic (Vitrified) FUKAMI #3000 Finishing Sharpening Stone - Grit: #3000 (Finishing) - Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Weight: Main 430g - Type: Soaking - Material: Ceramic (Vitrified) Planned by ALTWAYS.LLC and proudly manufactured in Japan. ✅ALTSTONE: Japanese Craft, Modern Edge In Japan, sharpening blades has never been just the work of professionals. For many years, people have used whetstones at home to keep their kitchen knives sharp—it’s a tradition deeply rooted in daily life. This culture has shaped the evolution of Japanese whetstones themselves. Brands like Shapton, King, Naniwa, and Suehiro have each developed their own technologies and philosophies, refining bonding methods, abrasive design, and sharpening feel. Japan has developed a particularly rich and refined sharpening culture. Few other countries offer such a wide variety of products tailored to different blade types, with such careful attention to sharpening feel and finish. In terms of materials, structure, and craftsmanship, Japanese sharpening stones continue to set a high standard globally. ALTSTONE offers products that reflect the refinement and subtlety of Japan’s sharpening culture. For example, our FUKAMI series is designed to handle a wide variety of blades—from stainless steel kitchen knives and carbon steel blades to blades with curved edges, like kitchen knives, and compact utility knives. By carefully selecting specifications such as hardness and surface texture, we aim to ensure a smooth and satisfying sharpening experience. Whether you’re just starting out or already familiar with sharpening, we focus on offering stones that are easy to use—yet precise enough that you can clearly feel the difference in sharpness after each session. Sharpening may not be flashy. But there’s something quietly special about the meal you prepare with a freshly sharpened blade. We hope that an ALTSTONE whetstone can be part of that small but meaningful change in your everyday cooking. ✅How to Use ALTSTONE Sharpening Stones ▶ Watch our sharpening tutorial on YouTube: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

FUKAMI - Pro Power. Perfectly Compact for Home Use [English ver.] Includes English manual ✅ Coarse to medium sharpening — smooth, efficient, and compact. Designed for serious results at home. Ceramic whetstone set for coarse & medium (#300 / #1000) with Nagura The ALTSTONE FUKAMI whetstone set includes a #300 coarse grit and a #1000 medium grit stone. These Japanese-made ceramic sharpening stones offer efficient, splash-and-go sharpening performance for kitchen knives. Ideal for repair and daily edge maintenance in a compact, easy-to-use format. [Features] - High Grinding Power: WA abrasives deliver consistent sharpening performance with dense ceramic construction. - Versatile Application: Effective for both stainless and high-hardness steel kitchen knives. - Non-Slip Mat Included: Ensures safe and stable sharpening without a whetstone stand. - Thorough Inspection: Each item is quality-checked by both manufacturer and seller before shipping. [Specifications] FUKAMI300 – Coarse Sharpening Stone - Grit: #300 (Coarse) - Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Nagura: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") - Weight: 430g (Main) / 70g (Nagura) - Material: Vitrified ceramic - Type: Soaking (for about 10 minutes ) FUKAMI1000 – Medium Sharpening Stone - Grit: #1000 (Medium) - Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Nagura: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") - Weight: 430g (Main) / 70g (Nagura) - Material: Vitrified ceramic - Type: Saking (for about 10 minutes ) Planned by ALTWAYS.LLC and proudly manufactured in Japan. ✅ALTSTONE: Crafted for Sharpening Excellence in Japan In Japan, sharpening blades has never been just the work of professionals. For generations, people have used whetstones at home to maintain their kitchen knives — a tradition deeply woven into daily life. This culture shaped the development of Japanese whetstones. Brands like Shapton, King, Naniwa, and Suehiro have each refined bonding methods, abrasive quality, and sharpening feel to meet different needs. Japanese sharpening stones now set a high global standard for material quality, structure, and craftsmanship. ALTSTONE honors this legacy with the FUKAMI series—designed for a wide range of blades from stainless steel to carbon steel, including curved and utility edges. By controlling hardness and surface texture, we ensure a smooth, responsive sharpening experience. Whether you're just starting or already skilled, ALTSTONE stones help you achieve edges that cut cleaner and cook better. How to Sharpen a Knife with ALTSTONE ▶ Watch our sharpening tutorial on YouTube: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

ALTSTONE “RIN” #1000 Non-Soaking Whetstone – Pro Series No soaking required – just splash and sharpen. “RIN” is a dense ceramic whetstone designed for speed, precision, and consistency. Set Includes: Main Whetstone (#1000) Nagura Stone (#1000) Anti-slip Rubber Mat Key Features: [Hard-Type Stone] Despite its hardness, “RIN” offers excellent blade contact without slipping. A perfect balance of hardness and grindability, suited for serious users. [Made in Japan] Crafted in Japan with strict quality control. The most-used #1000 medium grit comes paired with a nagura stone for surface conditioning. From planning to shipping, all stages are managed in Japan to ensure both quality and value. [#1000 Grit – The Essential Grit] This is the standard grit for routine maintenance. It easily restores slightly dulled knives, and for most home cooking, #1000 grit is all you need. Ideal for beginners purchasing their first whetstone. [High Abrasive Power] Infused with a high concentration of white aluminum oxide (WA), this stone offers powerful sharpening. Even first-timers can instantly feel the steel being ground away. [Compatible Steels] Sharpen stainless kitchen knives, high-hardness carbon steel knives, and more. Note: Not suitable for non-metal blades (e.g. ceramic), titanium, or other exotic alloys. [Anti-Slip Mat Included] Includes a kitchen-grade rubber mat that prevents slipping even on stainless surfaces. Carefully selected from dozens of materials to ensure strong grip. You can start sharpening immediately—no base required. [Double Inspected] Every stone is thoroughly checked both by the manufacturer and by us before shipping to ensure flawless quality. [Specifications:] - Main Stone Grit: #1000 - Nagura Grit: #1000 - Main Size: 180 × 60 × 20 mm - Nagura Size: 28 × 60 × 20 mm - Weight: Main: 520g / Nagura: 70g - Water Absorption: None (Non-soaking. Use instantly with a splash of water)

ALTSTONE RIN #10000 [English ver.] Includes English manual No Soaking Needed – High-Density Ceramic Whetstone "RIN" Always ready to use. Thanks to its non-absorbent nature, "RIN" allows you to start sharpening immediately—no soaking, no waiting. 【Set Includes】 - Whetstone - Nagura stone - Compact anti-slip mat 【Firm Type】 A hard-type stone that delivers reliable sharpening. Balanced for both hardness and cutting performance. 【Made in Japan】 Japanese-made ceramic whetstone. We work with domestic factories to manage everything from planning to delivery, ensuring top quality at a reasonable price. 【High Abrasive Power】 Packed with high-density WA (white aluminum oxide) abrasives, it offers excellent metal removal. Even beginners can clearly feel the knife getting sharper as metal is shaved away. 【Compatible Steels】 Suitable for common household stainless steel knives and even high-hardness carbon steel (hagane) blades. Note: Not compatible with non-metal blades such as ceramic or special materials like titanium. 【Anti-Slip Mat Included】 Comes with a compact anti-slip mat so you can sharpen safely even on stainless kitchen countertops. The mat’s rubber material was carefully selected from dozens of options for maximum grip. Ideal for users without a dedicated whetstone base. 【Thorough Quality Control】 All stones undergo double inspection—first by the manufacturer, then by us—to ensure only flawless products are shipped. 【Specifications】 Grit:  Main Stone: #10000 / Nagura: #10000 Size:  Main Stone: 180 × 60 × 20 mm (7.1 × 2.4 × 0.8 inches)  Nagura: 28 × 60 × 20 mm (1.1 × 2.4 × 0.8 inches) Weight:  Main Stone: 520 g (18.3 oz)  Nagura: 70 g (2.5 oz) Water Absorption: None – use it dry without soaking. 【Shipping】 Free shipping within Japan. Shipping method will be determined based on inventory and whether items are bundled. Make your everyday cooking more enjoyable. A sharper knife transforms the way you cook. If this product interests you, click "Add to Cart" and get started today.

NEW CERAX CR-3800 | No.3 Size Dual-Grit Whetstone (#1000 / #3000) The NEW CERAX No.3 Size Dual-Grit Whetstone is designed as an all-purpose sharpening stone for home use, and is also ideal for those who wish to keep their sharpening setup minimal. The “No.3 size” (3号型) is Suehiro’s compact-size standard, offering excellent portability without sacrificing performance. It comes with a storage case that doubles as a non-slip base and water tray, making it suitable for sharpening a wide variety of blades — from kitchen knives to woodworking tools, hatchets, and outdoor knives. With the combination of #1000 (blue) for medium sharpening and #3000 (yellow) for fine finishing, it offers outstanding versatility for both stainless steel and carbon steel. Includes a nagura stone for cleaning and conditioning the whetstone surface. Specifications: Model: CR-3800 Type: Dual-Grit Whetstone — Yellow #3000 / Blue #1000 (WA abrasive) Whetstone dimensions: 183 × 63 × 13 mm & 183 × 63 × 15 mm (approx. 7.20" × 2.48" × 0.51" & 7.20" × 2.48" × 0.59") Package dimensions: 240 × 93 × 46 mm (approx. 9.45" × 3.66" × 1.81") Weight: approx. 950 g (33.51 oz) JAN code: 4966684080171 About Suehiro: Suehiro is a long-established Japanese whetstone manufacturer with decades of expertise in sharpening technology. Renowned for their precision and quality, Suehiro products are trusted by professionals worldwide.

ALTSTONE RIN #5000 [English ver.] Includes English manual No Soaking Needed – High-Density Ceramic Whetstone "RIN" Always ready to use. Thanks to its non-absorbent nature, "RIN" allows you to start sharpening immediately—no soaking, no waiting. 【Set Includes】 - Whetstone - Nagura stone - Compact anti-slip mat 【Firm Type】 A hard-type stone that delivers reliable sharpening. Balanced for both hardness and cutting performance. 【Made in Japan】 Japanese-made ceramic whetstone. We work with domestic factories to manage everything from planning to delivery, ensuring top quality at a reasonable price. 【#3000 Grit – Smooth Finish with Enhanced Sharpness】 Step up your edge with a #3000 finishing stone. It's perfect for removing micro-scratches from medium grits and gives your knife a noticeably sharper feel. Recommended for first-time finishers. 【High Abrasive Power】 Packed with high-density WA (white aluminum oxide) abrasives, it offers excellent metal removal. Even beginners can clearly feel the knife getting sharper as metal is shaved away. 【Compatible Steels】 Suitable for common household stainless steel knives and even high-hardness carbon steel (hagane) blades. Note: Not compatible with non-metal blades such as ceramic or special materials like titanium. 【Anti-Slip Mat Included】 Comes with a compact anti-slip mat so you can sharpen safely even on stainless kitchen countertops. The mat’s rubber material was carefully selected from dozens of options for maximum grip. Ideal for users without a dedicated whetstone base. 【Thorough Quality Control】 All stones undergo double inspection—first by the manufacturer, then by us—to ensure only flawless products are shipped. 【Specifications】 Grit:  Main Stone: #10000 / Nagura: #10000 Size:  Main Stone: 180 × 60 × 20 mm (7.1 × 2.4 × 0.8 inches)  Nagura: 28 × 60 × 20 mm (1.1 × 2.4 × 0.8 inches) Weight:  Main Stone: 520 g (18.3 oz)  Nagura: 70 g (2.5 oz) Water Absorption: None – use it dry without soaking. 【Shipping】 Free shipping within Japan. Shipping method will be determined based on inventory and whether items are bundled. Make your everyday cooking more enjoyable. A sharper knife transforms the way you cook. If this product interests you, click "Add to Cart" and get started today.

ALTSTONE RIN #8000 [English ver.] Includes English manual No Soaking Needed – High-Density Ceramic Whetstone "RIN" Always ready to use. Thanks to its non-absorbent nature, "RIN" allows you to start sharpening immediately—no soaking, no waiting. 【Set Includes】 - Whetstone - Nagura stone - Compact anti-slip mat 【Firm Type】 A hard-type stone that delivers reliable sharpening. Balanced for both hardness and cutting performance. 【Made in Japan】 Japanese-made ceramic whetstone. We work with domestic factories to manage everything from planning to delivery, ensuring top quality at a reasonable price. 【#8000 Grit – Super Fine Finish】 Bring your blade to the level with a #8000 super finishing stone. It refines the edge to a mirror-like polish, removing the finest scratches and delivering a razor-sharp, silky cutting feel. Ideal for professionals and those seeking peak sharpness. 【High Abrasive Power】 Packed with high-density WA (white aluminum oxide) abrasives, it offers excellent metal removal. Even beginners can clearly feel the knife getting sharper as metal is shaved away. 【Compatible Steels】 Suitable for common household stainless steel knives and even high-hardness carbon steel (hagane) blades. Note: Not compatible with non-metal blades such as ceramic or special materials like titanium. 【Anti-Slip Mat Included】 Comes with a compact anti-slip mat so you can sharpen safely even on stainless kitchen countertops. The mat’s rubber material was carefully selected from dozens of options for maximum grip. Ideal for users without a dedicated whetstone base. 【Thorough Quality Control】 All stones undergo double inspection—first by the manufacturer, then by us—to ensure only flawless products are shipped. 【Specifications】 Grit:  Main Stone: #8000 / Nagura: #8000 Size:  Main Stone: 180 × 60 × 20 mm (7.1 × 2.4 × 0.8 inches)  Nagura: 28 × 60 × 20 mm (1.1 × 2.4 × 0.8 inches) Weight:  Main Stone: 520 g (18.3 oz)  Nagura: 70 g (2.5 oz) Water Absorption: None – use it dry without soaking. Make your everyday cooking more enjoyable. A sharper knife transforms the way you cook. If this product interests you, click "Add to Cart" and get started today.

Description: No soaking needed — sharpen instantly with the high-density ceramic whetstone “Rin”. This product is the whetstone only — no nagura or non-slip base is included. Ideal for users who already own accessories or prefer a minimal setup. Features: [Hard Type] Although hard, the stone grips well and sharpens smoothly, with an excellent balance of hardness and grinding performance. [Made in Japan] Developed in cooperation with domestic factories, with complete quality control from planning to shipping, to deliver Japanese-made whetstones at a reasonable price. [#1000 Grit] The standard grit for general sharpening. Perfect for restoring slightly dulled kitchen knives. Many home cooks find #1000 sufficient as a finishing stone for daily cooking needs. An ideal first whetstone for beginners. [High Cutting Power] Contains a high concentration of WA abrasive for excellent metal removal. Even first-time sharpeners can immediately feel the steel being smoothly abraded. [Compatible Steels] Suitable for common stainless kitchen knives as well as high-hardness carbon steel blades. Not for non-metal knives such as ceramic blades or special alloys like titanium. [Strict Inspection] Each stone is double-checked by the manufacturer and in-house before shipping, ensuring only flawless products are delivered. Specifications: - Grit: #1000 - Size: 180 × 60 × 20 mm (7.09" × 2.36" × 0.79") - Water Absorption: None (non-soaking — ready to use immediately)

Suehiro NEW CERAX CR-4800 Dual-Sided Whetstone #1000 / #6000 (No.3 size) A versatile two-in-one stone for home users and minimal, cost-effective setups. The storage case doubles as a water tray and non-slip base. Suitable for kitchen knives, woodworking tools, hatchets, and outdoor knives. Grit pairing #1000 (medium) + #6000 (finishing): for stainless and carbon steels; refines the edge to a keen, delicate sharpness. Includes a surface-cleaning nagura stone. Specifications - Model: CR-4800 - Combination: White #6000 / Blue #1000 (WA) - Stone size (#6000 side): 183 × 63 × 13 mm (7.20" × 2.48" × 0.51") - Stone size (#1000 side): 183 × 63 × 15 mm (7.20" × 2.48" × 0.59") - Package size: 240 × 93 × 46 mm (9.45" × 3.66" × 1.81") - Weight: approx. 950 g (33.51 oz / 2.09 lb) - JAN: 4966684081024 About Suehiro A long-established Japanese whetstone maker known for research-driven abrasives, trusted by many professionals.

“Kouseki” – a super finishing whetstone originally produced by the magnesium oxide method, valued as an alternative to natural whetstones for polishing blades such as barber scissors. Our unique firing process reproduced its hard, dense, and smooth sharpening feel with strong grinding power. It was highly regarded as a high-quality whetstone without concerns of deterioration or cracking. As one of Suehiro’s signature brands, “Kouseki” served as a replacement for high-grade natural whetstones, which had long suffered from quick depletion. The earlier version of Kouseki was manufactured by the magnesium oxide method, a natural cementing technique developed in the 1970s that combined ultrafine abrasive particles with magnesium oxide (MgO). This gave it strong sharpening power and effectiveness for stainless steel and cobalt cemented carbide barber scissors, razors, and similar tools. However, whetstones made by the magnesium oxide method also had weaknesses: deterioration from long immersion in water, and cracking caused by temperature changes or drying. In response to user requests to overcome these issues while preserving the excellent sharpening feel, Suehiro undertook many years of research and development. The result is the “New Kouseki” (improved based on customer feedback). By adopting our original vitrified manufacturing (firing) method, we have succeeded in reproducing and even surpassing the sharpening feel and grinding power of the magnesium oxide version, while eliminating its former shortcomings. Made with #10000 (sub-micron) ultrafine abrasive particles, it delivers stable performance, refined sharpening, and uncompromising quality. Enjoy the “New Kouseki”—a whetstone created without compromise, improved for modern use while carrying forward the spirit of its predecessor. [Contents] - Kouseki Whetstone (whetstone rack not included) - Whetstone-Polishing Coarse Stone (Green, GC#220) - Whetstone-Polishing Finishing Stone (White, WA#1000) [Specifications] - Product No.: SRK-10000 - Super Fine Finishing Whetstone #10000 - Whetstone Size: 207 × 73 × 23 mm - Package Size: 310 × 132 × 40 mm - Approx. Weight: 1000–1100 g - Includes polishing whetstones (coarse GC#220, finishing WA#1000) - JAN Code: 4966684088108

FUKAMI - Pro Power. Perfectly Compact for Home Use [English ver.] Includes English manual ✅ The #1000 grit sweet spot — versatile, efficient, and built in Japan for sharp, everyday performance. ALTSTONE FUKAMI #1000 Ceramic Whetstone without Nagura – Made in Japan Tired of dull kitchen knives? Rediscover the joy of effortless cutting with the ALTSTONE FUKAMI #1000—a medium grit ceramic whetstone designed for clean, precise sharpening at home. Whether you’re prepping daily meals or maintaining your favorite blades, this stone delivers professional results with ease. Made in Japan – Vitrified bonded ceramic whetstone crafted with precision. #1000 Medium Grit – Suitable for everyday kitchen knife maintenance. Sharp Results – Achieve razor-sharp edges for daily cooking needs. Double Quality Check – Inspected at factory and again before shipping. Specifications Grit: #1000 (Medium) Main Stone Size: 180 × 60 × 20 mm Weight: 430g (main) Bond: Vitrified Ceramic Use: Soaking Type Planned by ALTWAYS.LLC. Proudly manufactured in Japan. ✅ALTSTONE: Precision-engineered in Japan In Japan, sharpening blades has never been just the work of professionals. For many years, people have used whetstones at home to keep their kitchen knives sharp—it’s a tradition deeply rooted in daily life. This culture has shaped the evolution of Japanese whetstones themselves. Brands like Shapton, King, Naniwa, and Suehiro have each developed their own technologies and philosophies, refining bonding methods, abrasive design, and sharpening feel. Japan has developed a particularly rich and refined sharpening culture. Few other countries offer such a wide variety of products tailored to different blade types, with such careful attention to sharpening feel and finish. In terms of materials, structure, and craftsmanship, Japanese sharpening stones continue to set a high standard globally. ALTSTONE offers products that reflect the refinement and subtlety of Japan’s sharpening culture. For example, our FUKAMI series is designed to handle a wide variety of blades—from stainless steel kitchen knives and carbon steel blades to blades with curved edges, like kitchen knives, and compact utility knives. By carefully selecting specifications such as hardness and surface texture, we aim to ensure a smooth and satisfying sharpening experience. Whether you’re just starting out or already familiar with sharpening, we focus on offering stones that are easy to use—yet precise enough that you can clearly feel the difference in sharpness after each session. Sharpening may not be flashy. But there’s something quietly special about the meal you prepare with a freshly sharpened blade. We hope that an ALTSTONE whetstone can be part of that small but meaningful change in your everyday cooking. ✅How to Sharpen with ALTSTONE ▶ Watch our sharpening tutorial on YouTube: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

FUKAMI - Pro Power. Perfectly Compact for Home Use [English ver.] Includes English manual ✅ The #3000 grit sweet spot — fine finishing, efficient, and built in Japan for razor-sharp performance. ALTSTONE FUKAMI FINE #3000 Ceramic Whetstone without Nagura – Made in Japan Want to take your edge to the next level? Refine and polish with the ALTSTONE FUKAMI FINE #3000—a fine grit ceramic whetstone designed for smooth, precise sharpening at home. Perfect for maintaining your favorite blades, this stone adds sharpness and refined cutting feel. Made in Japan – Vitrified bonded ceramic whetstone crafted with precision. #3000 Fine Grit – Suitable for polishing and finishing kitchen knives. Sharp Results – Achieve refined, razor-sharp edges for daily cooking needs. Double Quality Check – Inspected at factory and again before shipping. Specifications - Grit: #3000 (Fine) - Main Stone Size: 180 × 60 × 20 mm - Weight: 430g (main), - Bond: Vitrified Ceramic - Use: Soaking Type Planned by ALTWAYS.LLC. Proudly manufactured in Japan. ALTSTONE: Precision-engineered in Japan In Japan, sharpening blades has never been just the work of professionals. For many years, people have used whetstones at home to keep their kitchen knives sharp—it’s a tradition deeply rooted in daily life. This culture has shaped the evolution of Japanese whetstones themselves. Brands like Shapton, King, Naniwa, and Suehiro have each developed their own technologies and philosophies, refining bonding methods, abrasive design, and sharpening feel. Japan has developed a particularly rich and refined sharpening culture. Few other countries offer such a wide variety of products tailored to different blade types, with such careful attention to sharpening feel and finish. In terms of materials, structure, and craftsmanship, Japanese sharpening stones continue to set a high standard globally. ALTSTONE offers products that reflect the refinement and subtlety of Japan’s sharpening culture. For example, our FUKAMI series is designed to handle a wide variety of blades—from stainless steel kitchen knives and carbon steel blades to blades with curved edges, like kitchen knives, and compact utility knives. By carefully selecting specifications such as hardness and surface texture, we aim to ensure a smooth and satisfying sharpening experience. Whether you’re just starting out or already familiar with sharpening, we focus on offering stones that are easy to use—yet precise enough that you can clearly feel the difference in sharpness after each session. Sharpening may not be flashy. But there’s something quietly special about the meal you prepare with a freshly sharpened blade. We hope that an ALTSTONE whetstone can be part of that small but meaningful change in your everyday cooking. How to Sharpen with ALTSTONE ▶ Watch our sharpening tutorial on YouTube: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

FUKAMI - Pro Power. Perfectly Compact for Home Use ✅ Coarse to medium sharpening — smooth, efficient, and compact. Designed for serious results at home. Ceramic whetstone set for coarse (#300) The ALTSTONE FUKAMI #300 coarse grit whetstone. These Japanese-made ceramic sharpening stones offer efficient, splash-and-go sharpening performance for kitchen knives. Ideal for repair and daily edge maintenance in a compact, easy-to-use format. [Features] - High Grinding Power: WA abrasives deliver consistent sharpening performance with dense ceramic construction. - Versatile Application: Effective for both stainless and high-hardness steel kitchen knives. - Thorough Inspection: Each item is quality-checked by both manufacturer and seller before shipping. [Specifications] FUKAMI300 – Coarse Sharpening Stone - Grit: #300 (Coarse) - Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Weight: 430g (Main) - Material: Vitrified ceramic - Type: Soaking (for about 10 minutes ) ✅ALTSTONE: Crafted for Sharpening Excellence in Japan In Japan, sharpening blades has never been just the work of professionals. For generations, people have used whetstones at home to maintain their kitchen knives — a tradition deeply woven into daily life. This culture shaped the development of Japanese whetstones. Brands like Shapton, King, Naniwa, and Suehiro have each refined bonding methods, abrasive quality, and sharpening feel to meet different needs. Japanese sharpening stones now set a high global standard for material quality, structure, and craftsmanship. ALTSTONE honors this legacy with the FUKAMI series—designed for a wide range of blades from stainless steel to carbon steel, including curved and utility edges. By controlling hardness and surface texture, we ensure a smooth, responsive sharpening experience. Whether you're just starting or already skilled, ALTSTONE stones help you achieve edges that cut cleaner and cook better. How to Sharpen a Knife with ALTSTONE ▶ Watch our sharpening tutorial on YouTube: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s