Actually I didn't watch these movies in an academic situation e.g. a gender studies class, but while going through piles and piles of pirate movies in Guangzhou. I was amazed by these serendipitous cinematic discoveriez:
新宿好T們 Shinjuku Boys
A film by Kim Longinotto and Jano Williams
England, 1995, 53 minutes
"From the makers of DREAM GIRLS, SHINJUKU BOYS introduces three onnabes who work as hosts at the New Marilyn Club in Tokyo. Onnabes are women who live as men and have girlfriends, although they don't usually identify as lesbians. As the film follows them at home and on the job, all three talk frankly to the camera about their gender-bending lives, revealing their views about women, sex, transvestitism and lesbianism. Alternating with these illuminating interviews are fabulous sequences shot inside the Club, patronized almost exclusively by heterosexual women who have become disappointed with real men. This is a remarkable documentary about the complexity of female sexuality in Japan today." (from Women Make Movies
http://www.wmm.com/filmcatalog/pages/c222.shtml) 
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