Mikawa Nagura 1559g This example is middle of

This example is middle of the road in terms of friability and cutting speed

and flatten them in our workshop

or a brighter polish with a glazed surface

The abrasive concentration is high

This particular stone is more friable than average

Mikawa Nagura 1559g This example is middle ofMikawa Nagura are Tuff stones, a type of igneous rock formed from lithified volcanic ash. Mined in Aichi prefecture starting 700 years ago, they have been used in traditional Japanese sword polishing progressions. The mine has been closed since the 1970s. We receive the stones from the wholesaler with rough chisel marks on both sides, and flatten them in our workshop. Although we have made a good effort to provide a flat surface for usage, we strongly