Continued interest in hentai seiyoku resulted in numerous journals and publications on sexual advice which circulated in the public, served to establish the sexual connotation of hentai as perverse.
Any perverse or abnormal act could be hentai, such as committing shinjū (love suicide). It was Nakamura Kokyo's journal Abnormal Psychology which started the popular sexology boom in Japan which would see the rise of other popular journals like Sexuality and Human Nature, Sex Research and Sex.
