Enjo-kōsai does not always involve some form of sexual activity.
In the opposite case of women paying men, it is called gyaku-enjo-kōsai The nature of enjo-kōsai is heavily contested within Japan.
Furthermore, in a 1998 survey by the Asian Women's Fund, researchers found that fewer than 10 percent of all high school girls engage in enjo-kōsai and over 90 percent of the girls interviewed attested to feeling uncomfortable with the exchange or purchase of sexual services for money.
The most common connotation is that it is a form of child prostitution whereby participating girls sell their bodies in exchange for designer goods or money.
However, enjo-kōsai is distinct from the most basic definition of prostitution (whereby a person attains money through the exchange of sexual acts) and insist that these other activities define enjo-kōsai.
Be prepared to be disabused, for whatever images you have conjured in your mind about finding love in Japan are certain to be skewed and not realistic, that is unless you’ve lived in the country before and you know the score.
This isn’t to say that you as a foreigner can’t find love in Japan, because some people do indeed have success, but it does mean that you need to ‘clear your mind’ and realize that there is much that is different and much to learn on the subject of love in Japan.