Japanese society may be extremely rigid and unforgiving in many ways.
But it’s also kind of extremely understanding and welcoming to all kinds of kinks, weirdness, and otaku-ness. Especially when it comes to making money from all the said kinks and otaku-ness. Which means it’s pretty easy for people who are into some specific things (sometimes harmlessly weird, sometimes outright wrong…from having full arena concerts for holographic anime characters instead of real singers and to all kinds of fetish sex places, including common pubs where you can pay to touch women’s breasts all you like) to find a niche and fellow-minded people to realize their wishes and live true to their weirdness.
It’s a land of contrasts, and I think what makes it special is that you can find your own niche of extreme here, your own safe place, be it the clean places where everyone follows social rules or the underground places where everyone goes to enjoy breaking them very explicitly, and you can choose the world you’d rather live in here.
I, admittedly, land on the rather rigid side, and the weird places and things people do I sometimes hear about still blow my mind from time to time.