Caveat that I know more about theater/performance studies than manga/anime. Nevertheless, I really enjoyed Ayako Kano's Acting Like a Woman in Modern Japan. The theory was solid and you might find the historical background helpful. There's also good work out there on Takarazuka and gender-bending performance traditions. Here's one example.
That said, if I were you, I wouldn't limit myself to looking for Japanese theorists exclusively, especially if you don't read Japanese. Why not broaden your literature review to work on feminism and "fandom" in general, then apply it to the particular case of anime/manga?