Pure Mikawa Shirakura Special Grade Koma 150g This is the highest quality and easiest-to-use Nakura among the Pure Mikawa Shirakura series. If used as a Nakura by lightly rubbing it on a natural or artificial whetstone while it is sufficiently wet, you should be able to achieve a better edge more quickly than usual. Simple Classification: ⭐︎Order of Grinding Power Ban Koma Yaebotan Botan Atsu Tenjo Mejiro ⭐︎Order of Fineness Koma Mejiro Tenjo Botan Yaebotan Atsu Ban ⭐︎Used for Swords Koma (Fine) ... Medium grit finish, Mejiro ... Medium grit finish, Atsu ... Medium grit ⭐︎Used for Razors Koma (Fine), Mejiro, Botan, Tenjo, Yaebotan ⭐︎Used for Sickles, Kitchen Knives, and Chisels Ban ★Because it is natural, no two are the same. The order of grinding power and fineness are only guidelines. Also, it is valued not only for use with natural whetstones but also by those who use it as a Nakura with artificial whetstones. Highly recommended for those having trouble with clogging! Many people also use it for sharpening planes, knives, chisels, kitchen knives, etc. Small sizes are also useful as a polishing agent.