Mikawa Shiro Nagura Koma 4.7oz. (134g) Japanese Natural Sharpening Stone
Mikawa Shiro Nagura Koma 4.7oz. (134g) Japanese Natural Sharpening Stone
Mikawa Shiro Nagura Koma 4.7oz. (134g) Japanese Natural Sharpening Stone

Mikawa Shiro Nagura Koma 4.7oz. (134g) Japanese Natural Sharpening Stone

Regular price $60.00 Sale price $52.00 Save $8.00
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Mikawa Shiro Nagura Koma 4.7oz. (134g) Japanese Natural Sharpening Stone

Approximately 51mmx36mmx36mm


According to Dr. Kuniichi Tawara who is a Metallurgy doctor, and very famous Japanese sword researcher, Koma molecule is 10 to 20 micron.

It should be right before fine grit sharpening.