Mikawa Nagura 2030g Dimensions: 220mm x 78mm x

Dimensions: 220mm x 78mm x 42mm

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

This particular one is harder than average

and flatten them in our workshop

The abrasive concentration is high

Mikawa Nagura 2030g Dimensions: 220mm x 78mm xMikawa 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