There's something kinda gross and wrong when random crackers on the internet will write essays on how Japan is chaste and sexless (lmao) even though it has a higher birthrate than Italy.
I certainly would be very careful to swing too far the other way and pretend Japan isn't an extremely backwards oppressive patriachy. Yes they have sex of course, but are you just going to ignore the entire context around where and how that sex happens?
If there is a valid criticism here its how these criticis usualy have no socialist or even leftist background therefore they turn to BS liberal social/economic analysis and comparisons to the "normal" western cultural habits as if ours is inherently better. In that case yes it falls flat.
But any Marxist can easily point out it is quite hard to have sex when the corporate culture encourages practices like "not leaving before the boss" or staying as late as possible despite the lack of actual work. These are all blatant issues but they're of course capitalist issues where instead a lib will point to it just being an "Asian culture" problem.