Quote Originally Posted by mainaman View Post
It is not a Kyoto stone but North Japan stone. It was mined in the summer and cut in the winter indoors, but because the weather was cold outside all windows were closed so all worker got lung disease and died around 1950, so no more made after 1950th.

The stone is very similar to Aoto in grit (~3-5k) but harder, this one has very nice blue figuring. Cuts fast, probably a bit faster than Aoto, and the slurry breaks down rather quickly. Very cool stone IMHO.
Great stones, congratulations! Are you going to use second one for razors or knifes?