Well, if this is legal, I wonder what their position on gay marriage is?
From what I've read, homosexuality as an actual real life matter is frowned upon in Japan. If many female liberation-related matters are even less resolved than in the western continent over there, you can't expect something like homosexuality to fare any better.
Oh, I'm living right in the middle of this, I'm well aware of Japan's varying attitudes towards homosexuality. There's an amusing amount of equality to it.
Hinode's hit on the major point - Japan likes everything to have a pretty face. So in public, everyone has their outward front. Japan is rigidly traditional in the idea that everyone is supposed to grow up, get a job, get married, have kids, and take care of their parents when they get old. And so you do all these things like it's your job.
However, it's also
practically expected extremely common for adultery to happen. It's entirely normal for men and women to have extra-marital relationships. Of course, you don't -talk- about them, but they happen far more frequently in Japan than in the West. Think of how porn has become acceptable in the West and that's what Adultery is like in Japan. It's just part of life.
So... the same holds true for homosexual couples. Japanese gay men are expected to grow up, get married, and have children and all that. Who they decide to commit adultery with is no one's business but their own. I assume the same holds true for Japanese lesbians, but I haven't asked. In general, female adultery is a little less common, but the numbers are getting more equal in modern times thanks to the internet. Mixi (sort of like Japanese facebook, you have to have a Japanese cell phone to register) in particular is home to a ton of Japanese housewives who are only there to find an adultery partner... >.>;;