Shelf life of women. At least that's the view. If you are above a certain age, you are seen as past your shelf life. So younger the better is what that translates too in beauty standards.
Yup. There's a cruel biological reality to this too, which of course the jeets and muslims abuse and stretch beyond all reasonable limits. It's just a simple fact that a healthy 16 year old woman has more "breeding years" in her than a healthy 30 year old woman does. And yes, I said "16" on purpose instead of "18" to make everyone uncomfortable and remind everyone a very large portion of the world is less willing to wait for a bit more maturity in their women than western civilization is.
Make no mistake, if not for the overwhelming outrage and disgust from the civilized parts of the world (backed with nukes, and I'm only half-joking about that), the muslims would be openly breeding girls as young as possible, regardless of the health risks to the poor girls. They probably still do it, and just keep it quiet and act all shocked and hurt when anyone accuses them. Look at how much they love their pedophile prophet and how pissed they get at you for pointing out he married and fucked a nine year-old girl, openly admitted in their holy texts. And you know that goat fucker wasn't using protection either. Can you tell Islam disgusts me on a visceral level even more than the street shitters do?
Japan is even simpler to explain: Too much fucking hentai. The uwu moe schoolgirls are no longer enough to arouse the gooner brain, so they look for even more uwu and even more moe. That is, younger. Then the 2D is no longer enough and they look for the real thing, reasoning that as long as pantsu are brocking shamefur parts, it's all fine and legal.
Nah, that's the easy bullshit cop-out answer that ignores rather serious social problems Japan has been quietly fomenting for half a century. They're not
quite as nuts about the whole "male carries the family bloodline" shit as China, but they're still pretty close. Japan was (and is)
absurdly traditional in terms of family structure -- men are the breadwinners, women are the homemakers -- and we've all seen how brutally hard they push men to work themselves to death (80-hour workweeks, no leisure time whatsoever, maximized minimalist living in efficiency apartments with the least possible luxury, basically giving themselves heart, body & soul to their employer).
Women are similarly pressured to find a man and start making babies as soon as fucking possible (especially in recent years as the government finally started "adjusting" its public policy having realized "oh shit, we're below the replacement rate now"). They try to downplay it in the international press and to foreigners when they ask locals, but the whole "Christmas cake" thing is real: in most places in Japan, a woman who's still single and unmarried at 25 years old faces serious social stigmatization.
You'd
think this is the kind of problem that solves itself -- there's no shortage of young men making decent money given the insanely hard work culture, and women all experience massive pressure to pair off and settle down with
somebody by 25, so what's the problem? Time. If you're a man working six twelve-hour days per week, getting just an hour or two to yourself to unwind on workdays (don't forget commute times -- very little driving in Japan; it's almost always trains to/from work) and a single day off each week, you have practically no time (or energy) to expend on dating. You may well be building a great nest egg and establishing a decent-to-good career (unless you luck out, do a phenomenal job on something and get noticed by a higher-up), but you're fucking exhausted. Even if a big titty girl like "from the anime" dropped in your lap and begged you for sex, she's begging someone craving sleep and rest.
It's kinda sad, since all that hard work isn't really amounting to as much as it used to. Japan aren't nearly as competitive technologically as they were in the 80's and 90's. I genuinely wonder what all that productivity is being shoveled into, because it's certainly not very "visible."