Seriously, if you're a celeb over there and caught smoking a joint, your career is basically over.
Even the infamously prudish U.S. is more accepting of it.
I'm guessing it's a leftover of U.S, imperialism, like how all their porn is still censored.
There isn't really a "hu" in Japanese. They say "fu" instead, as in "Fujiyama" (Mt. Fuji) . If I recall, the aristocratic classes back in the day would actually pronounce the "breathy F" as more of a "hu" sound.
It's a similar situation as the infamous Japanese "R" sound that is halfway between an R and an L.
Yeah they say "ha hi fu he ho" - no idea what the connection is between H and U that it's such a weird exception
I think it has to do with "lazy" pronunciation merging them over time. The kana for the particle "wa" is also normally pronounced as "ha," the kana for the particle "e" is normally prounced "he," and so on.