Shohonyama Ōhira Uchigumori Japanese Natural Whetstone (2,135g)
Approx. 207 × 70 × 62 mm
An authentic, large Uchigumori natural whetstone from the legendary Ōhira Mine in Kyoto, Japan.
This high-grade stone features a naturally weathered white exterior that conceals a clean, classic, and premium Uchigumori sharpening surface beneath. Once lapped, it reveals the refined characteristics that have made Ōhira Uchigumori stones famous among craftsmen and collectors worldwide.
Traditionally used in the final stages of Japanese sword polishing, Uchigumori stones are highly regarded for their unique finishing qualities. This stone produces a rich, pinkish slurry and creates a flawless, misty Kasumi finish that beautifully enhances the Hamon (temper line) and Jihada (forged steel grain pattern).
To preserve its traditional heritage and originality, the stone has intentionally been left in its original, unlapped condition, allowing the owner to prepare the surface according to personal preference.
Specifications & Features
Origin: Shohonyama, Ōhira Mine (Kyoto, Japan)
Type: Uchigumori
(Produces a rich pinkish slurry)
Grade: High-Grade Uchigumori
Dimensions: Approx. 207 × 70 × 62 mm
Weight: 2,135 g
Hardness: Medium to Semi-Hard
Condition: Unused Vintage Stock
(Original raw, unlapped surface)
Suji (Lines): Minimal and completely safe for sharpening
Protection: Sides and bottom sealed with Ishisan premium water-based protective lacquer
Performance & Application
• Traditional finishing stone for Japanese sword polishing
• Produces a rich pinkish slurry characteristic of quality Uchigumori
• Creates a beautiful, misty Kasumi finish
• Enhances the appearance of the Hamon and Jihada
• Excellent for precision finishing and surface refinement
• Allows the user to lap and customize the working surface as desired
Recommended For
Japanese Sword Polishing
Traditional restoration and finishing work for Nihonto and other fine blades.
Kitchen Knives
Achieving a premium Kasumi finish on high-end Japanese knives.
Carpentry Tools
Precision polishing for chisels (Nomi), plane blades (Kanna), and fine woodworking tools.
Collectors
A rare original-state specimen valued for its authenticity and traditional preservation.
Collector's Note
Original, unlapped Ōhira Uchigumori stones of this size and condition have become increasingly difficult to obtain. Many surviving examples have already been surfaced or modified, making untouched vintage stock especially desirable among enthusiasts and collectors.
Its substantial dimensions, authentic character, and traditional presentation make this stone an excellent example of Kyoto's historic natural whetstone heritage.
Authentic Shohonyama Ōhira Uchigumori Natural Whetstone.
Rare original-state specimen with naturally weathered exterior and premium interior stone quality.
Large 2,135 g vintage stone from Kyoto, Japan.
A collector-grade and professional-use Japanese natural finishing stone with outstanding traditional appeal.
