Maybe. You'll have to ask Yamashita-san about that. Be sure to tell him what you're trying to finish. A finish stone for a sword is not the same as a finish stone for a chisel is not the same as a finish stone for a razor. This stone may well make a great finisher for a chisel but be too coarse for a razor. Then there is the issue of su which can affect the suitability of a stone as well, so you'll probably want a sunashi stone. But some su stones are fine depending on the nature of the su - again it all depends on the individual stone.
It's frustrating and complicated, but that's the nature of Japanese natural hones. At least the Japanese have tried to come up with a classification system for their stones - unfortunately it's a complicated classification system, but that's the Japanese for you. Even the Belgians and Thuringens have their variations, and though the lack of a grading system (other than by color) makes them seem simpler the reality is that you are left with no way to evaluate them other than trying them, the same as with barber hones.