Japanese Natural Whetstone *Rare* Choshi - to Extra Large Grit #400 / 8439g

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ikyu-japanavenue

$569.00 USD

Japanese Natural Whetstone *Rare* Choshi - to Extra Large Grit #400 / 8439g from Chiba Pref. Japan


We bought this Choshi-to from a collector in Jappan. Choshi was a natural whetstone mined in Choshi City, Chiba Prefecture, mainly used as an ara-to (coarse whetstone). It is similar to Nagasaki Omura  and Wakayama Omura, and can be identified by the chisel marks on its sides and back. Mining of Choshi Toishi ended in the late 1940s. Later, a large quantity of Choshi whetstones was discovered under the eaves of a temple in Choshi during renovations, and some were released to the market. However, it has now become an extremely rare whetstone.  Choshi has been excavated from ancient tomb sites dating back to the Kofun period, and records of its use exist from the Heian period. It is also believed to have been used for polishing swords during the Edo period. Currently, Choshi is no longer mined, making existing pieces highly valuable. As a result, they are difficult to obtain and are mainly traded among collectors and professionals. After  test, we found that it is not as coarse as Omura but has a grit equivalent to around #400, with a certain degree of friability. The slurry forms quickly and continuously.  Large size, it is recommended as a coarse whetstone before the middle process. The scratches produced during this Choshi sharpening stage are also mild.

 Please note that these are not for beginner sharpeners since they're harder to use. These are natural stones meaning that every single one of them are different so my measured sizes are not accurate. This is a lifetime investment for people who live sharpening their knives, razors  and tools, do not hesitate to ask me your questions

-Dimension / Weight / Hardness / Grit Size
 123mm x 291mm x 109mm / 8439g /3.5 / #400

- Excellent stone for farmer tools, knives, woodworking tools.
Please check the pictures and don't hesitate to ask any questions about the item ! 
Thank you.


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