IIRC, hi_bud_gl and 0livia have both tried the Amakusa Red and found that it was not suitable for razors. Inclusions and other inconsistancies in the stones. Not sure about the white, though; I've not seen anyone try. The Aoto could be used as a bevel setter, if you don't have too much work to do. I have one (for the moment), but I use it after a Norton 1k, not to set bevels.