LGBT activism or any kind of activism for that matter has never been a big part of the Japanese psyche. However, there are no religious objections as you might find in America. The only objections boils down to: "two men? yuck!" rather than any "moral" arguments. The younger generation wouldn't mind such rights, but the older ones are more stubborn.
The idea of same-sex couples raising children boils down to the same prejudices as you might find anywhere: that it's bad for kids, unless of course it's two pretty (and not ugly) lesbians in which case they'd say it's okay. In the law, it is not established, so the only sources of adoption for them as of now are from overseas, and in vitro fertilization options for non-married women are accessible only overseas as well, although there are "unofficial" sperm donation services, although there are risks due to the fact that none of those are backed by medical organizations.
last edited at Feb 27, 2017 8:17AM