Smart post dump, you captured the Japanese situation well. But really in universities if you are honest about your sexuality here and present yourself respectfully and not too 'differently' you wont be turned away by almost anybody, which I could say is true for most of the industrialised world.
The ancient rome like thing is called Satsuma culture (basically) if anyone wants to look that up.
But what I was suprised to find is that Japanese guys in general are more fashionable, sensitive, have female friends, behave well, are studious and thusly come across as "gayer" than people back home. But in the gay bars there was a much higher proportion of what I would call normal gay men i.e. no makeup, no female clothes, no hand swinging, no outrageous laughing, no madonna, no lady gaga. Even the music in the clubs here in Osaka is freakin great, no more britney techo remixes :D Unless they are awesome, which can happen (said it!), heard a great fat bass remix of toxic, very cool, took all my friends from uni and had a great night.
Broke back mountain was a bad example of gay hate killings, but I didn't know any names of famous incidents at the time, but theres plenty.