@VincentYamato, to answer your question: yes, yes, they are. Japanese society is incredibly conservative, deeply rooted in an honour system that's integral to the culture. The only way it's sort of acceptable for a teenage girl to become pregnant is if she's married to an adult man. As in many countries, it's perfectly legal for a person who's 16 or 17 to marry someone if the parents give their consent. And by adult man, I mean 20 or older. Being a single mother is also looked down upon, unless the husband died. Yes, husband. Having children out of wedlock is a big no-no. It's also generally expected in Japan that once a woman has her first child, she quits her job and becomes a full-time housewife. You still see that happening in the west, though mostly in the US.