Mikawa Shiro Nagura Koma 7.2oz. (213g) Japanese Natural Sharpening Stone
Mikawa Shiro Nagura Koma 7.2oz. (213g) Japanese Natural Sharpening Stone
Mikawa Shiro Nagura Koma 7.2oz. (213g) Japanese Natural Sharpening Stone
Mikawa Shiro Nagura Koma 7.2oz. (213g) Japanese Natural Sharpening Stone
Mikawa Shiro Nagura Koma 7.2oz. (213g) Japanese Natural Sharpening Stone

Mikawa Shiro Nagura Koma 7.2oz. (213g) Japanese Natural Sharpening Stone

Regular price $350.00 Sale price $335.00 Save $15.00
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Mikawa Shiro Nagura Koma 7.2oz. (213g) Japanese Natural Sharpening Stone

Approximately 68mmx52mmx31mm

It is pretty nice shape, and great quality Koma Nagura.

Koma, Mejiro, and Tenjyo are fine grit layers of Mikawa Shiro Nagura.

Koma is used for Samurai Sword polishing traditionally, and it has been harder and harder to get in.

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

It should be good for right before starting the fine grit sharpening.

For razor sharpening, it is used one process before sharpening by fine grit whetstone like Nakayama, Ozuku, Wakasa, etc.