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Aiwadani Tamamoku・Natural Finishing Stone・Awasedo・Shiga, Japan #104
Aiwadani Tamamoku・Natural Finishing Stone・Awasedo・Shiga, Japan #104
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Aiwadani, stamped 相岩谷産 under the Kyoto natural-stone mark, with a selection mark below it. From Shiga, next to Kyoto.
A long, narrow bench stone in pale straw-yellow, with tamamoku — the ring figure that gives this layer its name — running through the face.
4,5 of 5 on our hardness scale, roughly 6000 grit. A hard stone: slow, controlled and sparing with slurry, the kind that rewards patience and leaves a crisp, bright edge rather than a soft one.
Suited to kamisori, straight razors and carbon steel knives.
You will receive the exact stone shown.
Full Description
Full Description
This Aiwadani natural finishing stone comes from the Aiwadani layer in Shiga, next to Kyoto, and is stamped 相岩谷産 under the Kyoto natural-stone mark. The face is a pale straw-yellow carrying tamamoku, the ring figure that gives this layer its name. At 4,5 of 5 on our hardness scale it is a genuinely hard stone with an estimated grit around 6000: it works slowly and precisely, is sparing with slurry, and finishes bright and crisp rather than soft. Its long, narrow format suits bench work on kamisori, straight razors and carbon steel knives, where control matters more than speed. You will receive the exact stone shown.
Materials
Materials
Natural Whetstone - Aiwadani
Measurements
Measurements
Length: 19,2 cm
Width: 6,7 cm
Height: 2,6 cm
Weight: 862 g
Hardness: ● ● ● ● ◐ (4,5/5) hard
Care Guide
Care Guide
To preserve the character, performance, and longevity of your natural Japanese whetstone, please follow these care guidelines:
1. Keep the Stone Flat
Natural stones wear more slowly than synthetic stones, but regular flattening is still essential for controlled sharpening. Use a diamond lapping plate or a suitable flattening stone to maintain a flat, even surface. Avoid aggressive lapping unless necessary.
2. Use Water Only
Natural Japanese whetstones are designed to be used with water. Lightly wet the surface before use. Some stones benefit from a brief pre-wetting, while others should not be soaked for extended periods. Do not use oil or chemical additives.
3. Slurry Management
Depending on the stone, slurry may develop naturally during use. This is part of the sharpening process and should be managed gently. Avoid excessive pressure or artificial slurry generation unless intentionally desired.
4. Clean After Use
After sharpening, rinse the stone thoroughly with clean water to remove metal particles and residue. Use a soft brush if needed. Do not use soap, detergents, or abrasive cleaners.
5. Dry Slowly and Naturally
Allow the stone to air dry completely in a shaded, well-ventilated area. Avoid direct sunlight, heaters, or rapid temperature changes, as natural stones can crack if dried too quickly.
6. Store with Care
Store the stone in a dry, stable environment. Avoid damp locations and protect the stone from impacts or sudden temperature changes. If stored long-term, ensure the stone is fully dry before placing it in a box or wrapping.
7. Inspect Before Use
Before each use, rinse the surface and ensure it is free from dust, grit, or foreign particles. Any contamination may cause scratches on the blade and compromise sharpening results.
By following these guidelines, your natural whetstone will retain its unique sharpening characteristics and provide consistent, controlled results over time.
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