Chūsei Nakayama Tomae (Polarized Type) – 2,357g
Approx. 205 × 75 × 63 mm
An exceptionally rare Japanese natural finishing stone (Awasedo) from the legendary Chūsei Nakayama layer in Kyoto, Japan. Sourced directly from Sazare Toishi Co., Ltd., this remarkable specimen offers documented provenance from one of Japan's most respected natural whetstone distributors.
Weighing 2,357 g and measuring an impressive 63 mm in thickness, this substantial stone represents a highly desirable example of Nakayama Tomae. Its large format, outstanding preservation, and official markings contribute significantly to both its practical and collector value.
Most notably, this specimen belongs to the rare Polarized Type (Henkō-shu / 偏光種), displaying distinctive iridescent color shifts that emerge under changing light angles. Such visually striking examples are highly sought after by collectors due to their uncommon geological characteristics and limited availability.
Originating from the historic Chūsei Nakayama zone, an area renowned for its exceptionally dense structure and refined sharpening qualities, this stone embodies both the historical significance and performance legacy that have made Nakayama stones legendary worldwide.
Specifications & Features
• Origin: Nakayama, Shōhonyama, Kyoto, Japan
Former Jingoji Temple Domain, Umegahata Hiraoka Nakasho Mukonochi-cho Tunnel
• Type: Chūsei Nakayama Tomae (Rare Polarized Type / Henkō-shu)
• Grade: Collector Grade
• Dimensions: Approx. 205 × 75 × 63 mm
• Weight: 2,357 g
• Hardness: Medium-Hard to Hard
• Condition: Unused, pristine condition with minimal suji lines and no significant cracks or chips
• Protection: Sides and back sealed with Ishisan premium water-based stone sealant
• Additional Features: Direct provenance from Sazare Toishi Co., Ltd., official distributor stamps, polarized iridescent coloration, exceptionally thick format, high-density structure
Performance & Application
• Ultra-fine abrasive structure suitable for advanced finishing work
• Produces exceptionally refined and highly sharp cutting edges
• Capable of achieving bright mirror finishes on steel
• Excellent Kasumi Finish characteristics on traditional Japanese blades
• Smooth and highly responsive Sharpening Feedback
• Dense structure supports precise Edge Refinement
• Suitable for demanding professional sharpening applications
Recommended For
• Kitchen Knives
• Straight Razors
• Carpentry Tools
• Precision Edge Tools
• Professional Sharpeners
• Collectors
Collector's Note
The Chūsei Nakayama layer occupies a unique position within the history of Japanese natural whetstones. Located within the former Jingoji Temple domain, this historic source is widely respected for producing stones with exceptionally dense grain structures, refined sharpening characteristics, and remarkable finishing ability.
Material from this ancient layer has not been actively mined for generations, making surviving stock increasingly scarce. Examples released through official channels with documented provenance are particularly desirable within the collector market.
The combination of Polarized Type coloration, direct provenance from Sazare Toishi Co., Ltd., original official distributor stamps, substantial dimensions, and exceptional preservation places this specimen among the more unusual and collectible Nakayama stones available today. Its rarity, historical significance, and visual character make it equally suitable for advanced collections and professional use.
Authentic Kyoto Chūsei Nakayama Tomae featuring rare Polarized Type iridescent coloration.
Directly sourced specimen with original official distributor stamps and documented provenance.
Massive 2,357 g stone with exceptional thickness, dense structure, and refined finishing capability.
An investment-grade Japanese natural whetstone combining historical significance, collector rarity, and outstanding sharpening performance.
