Japanese teachers are weird as fuck ngl. i worked there for a year as an english instructor and the popular male teachers were definitely pervs who'd take advantage of the ditzy teen girls in their class. i saw some of them secretly date high schoolers and talk openly about sleeping with them etc. every time a new cohort of girls would come in these guys would discuss who was the cutest, best to sleep with, or what underwear they are wearing. a lot of them were married too which made things even weirder.