Hi everyone,
bought this one from Ikkuy Japanavenue in 2021.
Kanjis:
Symbol 正本山合砥 = Kyoto Natural Hone Sales Association
新田 = Shinden
白巣板 = Shiro Suita
Medium hardness, fast, fine but not too fine for kitchen. No toxic inclusions, lines, etc. It has a very pleasant chalky/creamy feeling...