Japanese Yuri and Yaoi in Manga
Manga, aka Japanese comics, have featured both gay and lesbian relationships since the 1970s. Yuri (Girls' Love) is the term for lesbian relationships in anime and manga, while Yaoi (Boys' Love) is the term for male gay relationships. The stories involve sexual experiences, but they focus on the romantic and intimate relationships as opposed to pornographic material.
In yaoi, the two male characters are usually called "seme" and "uke," slang for anal sex. These martial-arts terms could be a reference to the male same-sex relationships that used to take place between the samurai and their companions.
Beginning in the '70s, yuri followed a common plot line that would involve a more mature-looking woman with a young admirer. They would have to work through a family upheaval of some kind, deal with a scandal due to their lesbian relationship, and then the older woman would die in a tragic ending.