Japanese natural whetstones Nakayama Koppa NK4
This is the raw stone from Kato's Mine which is currently being processed. Selected and tested, stamped with Kyoto Natural Whetstone Association. This is the Aisa layer between Tomae and Namito. Nakayama Koppa brownish color slightly hard but very fine grain and smooth, best to use with Nagura. This is a good quality finishing stone.
Hardness: 4.5/5
Speed: 3.5/5
Smooth: 4/5
Finesse: 4/5
Size: 161mm(L) x 78mm(W) x 18mm(H)