Detailed Spec

Very clean and even Yaginoshima, relatively hard but still easy to use natural. Leaves a very pretty, even slightly shiny finish on bevels, good for edge work too. 

Brand: Tanaka Toishi 田中砥石工業所
Product Type: Natural Stone
Size: Type 40
Mine: Yaginosima
Producing Area: Kyoto/ Japan
Hardness (5 = Very Hard) : 3.7
Grain Scale (5 = Very Fine) : 3.6
Sharpening Speed (5 = Very Fast) : 4