I would describe the Nakayama I have as a gentle stone. It's quite fast but at the same time not aggressive and my friend explained to me it does indeed produce a shallow and uneven scratch pattern. It also produces a frosty and very bright polish and he explained that because the scratch pattern is shallow and uneven, the light reflects differently compared to an artificial stone, and that's one of the reasons for this frosty and bright polish. Another reason for this type of finish he said, is that at the same time minerals in the stone react with the steel. All I know is I really like how it finishes and the edge it produces.