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Yaginoshima・Natural Whetstone・Aito・Awasedo・Kyoto, Japan #32
Yaginoshima・Natural Whetstone・Aito・Awasedo・Kyoto, Japan #32
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Sourced from Yaginoshima in Kyoto, this hard natural whetstone is classified as an Aito, positioned between intermediate and fine finishing work. Its dense structure and controlled abrasive action make it particularly suitable for precise edge refinement and micro-bevel work.
You will receive the exact stone shown.
Full Description
Full Description
Yaginoshima (八木ノ嶋 ) is a whetstone-producing area in Kyoto located east of the Ōhira region. Stones from this area are historically associated with the production of quality Suita and are part of the broader Tanba geological region, which also includes the origins of Tanba Aoto stones.
This stone is marked and classified as Aito (合砥), a designation traditionally used for stones intended to bridge coarse sharpening and final finishing stages. Stones of this type are valued for their balance of efficiency and control, offering refinement without the delicacy of ultra-fine polishers. The Asagi designation refers to the stone’s color and layer type, commonly associated with a fine, even grain and a calm sharpening response.
In practical use, stones from Yaginoshima are known for their dense structure and restrained slurry behavior, supporting deliberate edge work where accuracy and repeatability are essential. Their role historically favored functional sharpening tasks over purely cosmetic polishing, making them well suited for refined edge definition and controlled finishing work.
As with all natural whetstones, each piece varies according to layer and cut. This stone should be regarded as an individual example rather than a standardized product. This listing represents one single stone.
For further information, please feel free to contact us.
Materials
Materials
Natural Whetstone - Yaginoshima Aito
Measurements
Measurements
Length: 12,1cm
Width: 8,4cm
Height: 2,9cm
Weight: 631g
Hardness: 4-5 - 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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