So, after speaking with a few customers, i feel its important i mention this about these stones... the gesshin 4000 grit stone is a little bit more "rustic" with regards to its fit and finish. It seems as though its just a bit more difficult for the maker to cut and shape. You may see some small scratches or other marks. These in no way effect the performance of the stone. It is still a crazy nice stone. It just may not look as pretty as the others Its just kind of one of those "cant be helped" things... i think i would have a problem with it if the stone wasnt so awesome. Anyways, i just wanted to make sure this info was out there.
Let me know if you guys have any questions.