Dôsôkai (1993)

Probably the first TV drama that portrayed gay relationship/sex openly and positively on a national television in Japan. It started as 'school reunion' (that's the title). This high school sweethearts couple just married. Then the wife (Y Saito) discovered that her husband (K Nishimura) is a closet homosexual. One night she goes to a gay town in Tokyo to discover his 'another life'. She got confused, got drunk and had sex with a bi-sexual boy (T Yamaguchi), who later would have a relationship with her husband... It's not one of the best TV dramas ever made but good acting (those three and the always good K Oginome) and the theme helped its purposes.