So, there's... another side of this issue and I feel it's incredibly relevant to this conversation: This doesn't just affect female characters and having followed a number of LGBT artists in Japan, as well being a fan of Housamo (Tokyo After School Summoners), it's a huge problem around the industry, as a whole. It's just obvious in the mainstream sense, the female characters do tend to get the most spotlight in this regards.
There seems to be an absolute disconnect when it comes to sexualization with minors and Japanese developers and artists and I'm not entirely certain why. Housamo, which is a gacha game and is incredibly inclusion with the cast of characters it has (largely started targeting manly gay and bisexual men, but started opening up to gay and bisexual women, as well as trans people as it went on), but it has a huge problem: There are plenty of sexualized depictions of minors in the game, and I'm not specifically talking about like Teenagers either. Like, young, pubescent boys.
And on to that, prominent LGBT artists that contribute to the game, have also been known to draw Shouta (don't google, it's essentially young prepubescent boys in sexual situations at times) from time to time on their twitter profiles and the like. And I don't mean just small independent artists either. Some of which have been incredibly popular among LGBT circles, western and Japan alike.
I really, really, don't know what the solution to this is. I wish there was an easier way to communicate to these people why these depictions are a problem. Unfortunately, due to my limited Japanese and not being that intertwined with Japanese circles as a result, I can't really make much headway on this discussion there. But it's frustrating when I see this, and I wish there was a way to at least begin the discussion there.