Yeah, no judgment, you can go to Japan and monger this way. But it's how clueless tourists monger, not locals. There are multiple risks (getting drugged/robbed, girls are unclean) and the quality of girls are really far from what is typically available in this business. You likely banged a Japanese-speaking Chinese or Korean chick if it was in some hole in Kabukicho.
It's like coming to new york and visiting sbarro because you want pizza. yes, you can say you had "pizza" in new york but it doesn't really resemble the authentic experience in flavor or most other ways. dropping knowledge on a pizza message board about your experience at sbarro strikes me even more silly.
My best advice for those that really want to monger in Japan is learn some Japanese and get on cityheaven. What OP has described is a tourist experience that I wouldn't recommend.
