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[w/ EN manual] ALTSTONE FUKAMI #1000/#8000 Whetstone Set | Ceramic Sharpening Stone from JAPAN
¥6,331
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
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[w/ EN manual] ALTSTONE FUKAMI #300 #1000 #3000 set Whetstone Sharpening stone
¥6,224
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
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[w/ EN manual] ALTSTONE FUKAMI #300/#1000 Whetstone Set | Ceramic Sharpening Stone from JAPAN
¥4,586
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
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[w/ EN manual] ALTSTONE FUKAMI #1000 Whetstone | Ceramic Sharpening Stone from JAPAN
¥1,888
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
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[w/ EN manual] ALTSTONE FUKAMI #3000 Whetstone | Ceramic Sharpening Stone from JAPAN
¥2,448
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
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[w/ EN manual] ALTSTONE FUKAMI #300 Coarse Whetstone | Ceramic Sharpening Stone from JAPAN
¥1,888
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
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[w/ EN manual] ALTSTONE FUKAMI #1000 Whetstone | Ceramic Sharpening Stone from JAPAN
¥2,338
FUKAMI – Pro Power. Perfectly Compact for Home Use ✅ The #1000 grit sweet spot — versatile, efficient, and built in Japan for sharp, everyday performance. ALTSTONE FUKAMI #1000 Ceramic Whetstone with 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. Includes Nagura – Not just for cleaning; this tool refreshes the stone surface and restores cutting power by preventing clogging and maintaining optimal abrasiveness. Stable Sharpening – Rubber non-slip mat included. No separate stand required. 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 - Nagura Size: 60 × 25 × 20 mm - Weight: 430g (main), 70g (Nagura) - Bond: Vitrified Ceramic - Use: Soaking Type - EAN: 4571506850155 - ASIN: B0BPGSKBM5 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.
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[w/ EN manual] ALTSTONE FUKAMI Fine grit #3000 Whetstone | Ceramic Sharpening Stone from JAPAN
¥2,968
Pro Power. Perfectly Compact for home use ALTSTONE FUKAMI #3000 Finishing Whetstone w/ Nagura | Japanese Sharpening Stone [Made in Japan] This ALTSTONE FUKAMI #3000 fine finishing whetstone is manufactured by Suehiro in Japan. It comes with a Nagura stone for surface refreshing and a high-grip non-slip mat. [High Grinding Power] Vitrified ceramic bonded with WA abrasives provides excellent sharpening feel and efficiency—ideal even for beginners. [Steel Compatibility] Suitable for most kitchen knives made of stainless or high-carbon steel. Not for ceramic or titanium blades. [Non-Slip Mat Included] A durable rubber mat is included, chosen to work well with stainless surfaces. No whetstone stand needed—sharpen safely anywhere. [Thorough Inspection] Each stone is double-checked—once by the manufacturer and again before shipment to ensure quality. ✅Specifications - Grit: #3000 (Fine finishing) - Main Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Nagura Size: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") - Weight: Main stone 430g / Nagura 70g - Type: Soaking stone - Material: Vitrified ceramic - EAN(JAN): 4571506850582 - ASIN: B0D8ZGMTG5 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 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.
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[w/ EN manual] ALTSTONE FUKAMI Fine grit #5000 Whetstone | Ceramic Sharpening Stone from JAPAN
¥3,958
Pro Power. Perfectly Compact for home use ALTSTONE FUKAMI #5000 Extra Fine Finishing Whetstone w/ Nagura | Japanese Sharpening Stone [Made in Japan] This ALTSTONE FUKAMI #5000 extra fine finishing whetstone is manufactured by Suehiro in Japan. It comes with a Nagura stone for surface refreshing and a high-grip non-slip mat. [High Grinding Power] Vitrified ceramic bonded with WA abrasives provides excellent sharpening feel and efficiency—ideal even for beginners. [Steel Compatibility] Suitable for most kitchen knives made of stainless or high-carbon steel. Not for ceramic or titanium blades. [Non-Slip Mat Included] A durable rubber mat is included, chosen to work well with stainless surfaces. No whetstone stand needed—sharpen safely anywhere. [Thorough Inspection] Each stone is double-checked—once by the manufacturer and again before shipment to ensure quality. ✅Specifications - Grit: #5000 (Extra Fine finishing) - Main Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") - Nagura Size: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") - Weight: Main stone 430g / Nagura 70g - Type: Soaking stone - Material: Vitrified ceramic 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 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.