is there a video of someone using those kinds of stones?
All of those marks look the same! Is it the red marks you are looking at? If so has anyone made a reference for the rest of us poor schmucks?Top to bottom mejiro, koma,yae botan, tenjou.
In order of coarse to fine is yae botan, tenjou, mejiro, koma
All of those marks look the same! Is it the red marks you are looking at? If so has anyone made a reference for the rest of us poor schmucks?