Mikawa Nagura 1337g This is a porous stone

This is a porous stone

This is a novelty product

Dimensions: 230mm x 73mm x 40mm (Largest dimensions)

Greatly increased cutting speed when compared to conventional abrasives

Dimensions: 228mm x 80mm x 51mm

Mikawa Nagura 1337g This is a porous stoneMikawa 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