Well used hone, I found most Nakayams I have tried to be a bit finicky to figure out. Some were more straight forward to figure out.
Digging deeper and deeper into this stamping thing is proving to be frustrating. Speaking with one source who has bought and sold over 1000 maruka stones directly from Hatanaka claims to have never seen the 'maruichi' stamp anywhere but at 'fake stone shops'.
It was also his opinion that old stones didn't have so many stamps on them. So the 3 or 4 nakayama maruichi kamisori stamped hones that have passed through my hands are all? counterfeits?
Do they sing Auld Lang Syne at Stone Collector's New Years dos? Guess they listen to Genesis and the like - Progressive Rock!!!! (I'm on a roll, why stop now).Remember this guy is Japanese so perhaps his wording wasn't perfect. But with sales of 1000 marukas and no knowledge of the maruichi stamp? Something is going on here.