[Product Summary]
This is an authentic Japanese natural whetstone (Tennen Toishi) from the renowned Hideriyama (日照山) mine in Kyoto, classified as a Tomae Suita (戸前巣板) finishing stone.
According to the supplier, it features the strong abrasive power characteristic of Tomae, cutting steel efficiently while remaining easy to control. Rated as Medium Hard (中硬), it provides a smooth, practical sharpening experience suitable for a wide range of users from kitchen knife sharpeners to woodworking enthusiasts.

[Condition]
- Pre-owned / Lightly used condition.
- Natural lines (suji) are visible across the stone; the supplier notes that they do not affect practical sharpening performance.
- All photographs were taken while the stone surface was wet to clearly show the natural grain, layer characteristics, and colors.
- As this is a 100% genuine mined stone, natural edge chips, uneven rough sides, color variations, and mineral inclusions are inherent to its authentic nature.

[Specs]
- Mine / Origin: Hideriyama, Kyoto, Japan (日照山 正本山合砥)
- Stratum / Type: Tomae Suita (戸前巣板) Finishing Whetstone
- Hardness: Medium Hard (中硬 - supplier classification)
- Max Dimensions: Approx. 128 mm x 67 mm x 30 mm (5.0" x 2.6" x 1.2")
- Weight: Approx. 579 g (1.27 lbs)

[Important Notes]
- The sharpening feel, feedback, and finish of natural whetstones vary depending on the blade steel, pressure, and user technique.
- As with all natural whetstones, occasional scratching can occur depending on usage and blade condition; please use with appropriate care.
- You will receive the exact, unique piece shown in the photographs.