Not about 放浪息子, but on the topic of transgender and Japan,
I recently read this article:
Basically, while it’s possible to officially change gender in Japan, one condition is to not be married (because same sex marriage isn’t recognized) and to not have underage children (because reasons?).
However, Elin, American married to a Japanese woman, does not have to conform to that, since she only have to care about the American law. So she officially became a woman, despite being married and having underage kids. Then she had to report the change to the Japanese administration, and things got “fun” (well, the marriage is just going to become void, I guess, despite them fighting to keep it valid).
I hope such event will help getting an actual recognition of same sex marriage in Japan…