It is called “NAGURA TOISHI” , “MIKAWA-SHIRO” in Japan. It used to polish the Japanese sword(polish level: middle) , Japanese Razor and Japanese Knife. Also, It’s polished liquid was used to polish the Japanese award Medal in the Ministry of Finance.
- Size: 50x50x40mm (size error: 5-15mm)
- Material: Natural mud whetstone
- Production area: Japan Aichi-pref
- Mining: Finished
- Size Error: 5-15mm
- Price : 1 piece stone