Thanks to Telly here and to a friend I have in Japan, I am now a very proud owner of a JNAT from 330mate. I just took a razor from not shaving arm hair to shave ready using a Nagura and a DMT Minisharp. It was the smoothest shave I have ever had from this razor (a Griffon, not that a Griffon is a bad shaver). I will be happy to share any insights I have, just shoot me a PM.