I don't see the need to repeat why jav censors, but I do understand how Japan did not improve male image. I can't blame Japan for being passive or aloof on this. Japan is still a more potent economy than Korea, but Korea's (national funded) pop culture attracted far more woman fans of men than Japan with decades of food, tourism, entertainment, pop, games, and tons of other stuff.
And eurocentism may mean the rest of Asia continues to be ignored. People won't ask just how SE Asian men may be capable or whatnot. Nor south Asians who are another large portion of Asia.
A bit broad by now but you can get that.