Stolen from the Jref.com forums
Reason for marriage
Love => people promise to love each other for ever when they get married (even if it's often a dream). Modern laws make it the same to get children outside marriage, so that if people only want children, marriage is not even necessary. Marriage is usually a proof of love and comitment for life. If
love disappears, people tend to divorce easily (except sometimes when there are small children, to avoid perturbing them psychologically).
Japan : Children => with or without love is not very important. Lots of marriage are still arranged ("miai") and some Japanese think that it's better than love marriage because loveless arranged marriage rarely end up in divorce as the purpose is to have and raise children, and for the woman often to quit working and care about the household. Japanese men often look down on women at work, but are usually ready to ask them to stay at home and pay for their expenses, even if their salary is tight. As the father of a child born outside marriage is not legally recognised, the marriage rate of parents is close to 100%.
Japanese family relationships
Even in love marriages, once a woman has a baby, her husband regards her as a mother, not a woman anymore, which means their sexual life comes to an end. The new mother is said to lose completely interest in her husband anyway (this may not be true in international couples, from what I've heard).
In most families, children sleep with both parents or just the mother. The the latter case, the father has his own room. I've been told that this way he couldn't wake his wife and children up when he comes back late from work.
Sleeping with the child(ren) in the middle of the parents is so common in Japan that Japanese and a special name for it, a comparison it to the kanji 川 (kawa = river). Children might sleep with their parents till age 3, 5, 8, 12 or even 16, depending on the family, number of children and space in the house.
Western reaction to children sleeping with parents
Westerners find for the least surprising that children sleep everyday with their parents (especially till age 12 or later !). They should not forget that on top of this it is normal in Japan for a father to have a bath with his children, even 20 year-old girls ! I guess that if the average Japanese man loses interest in his wife once she becomes a mother, there is no problem with children either.
I've heard a lot that Westerners would be afraid of crushing their new-born baby by sleeping in the same bed, but I was told that it never happened (of all mamals, only male sealions and pandas sometime crush their babies to death when sleeping with them, but never humans would it seem). The good point of the mother sleeping with the baby is that the baby doesn't cry because it feels secure near its mother and has a unexhaustable warm-milk bottle at its disposal. I've read that it was better for babies to be breastfed than drink other milk. That system definitely has its advantages.
Another concern is that the parents lose their privacy and can't have sex anymore - unless doing it in front of the child, which is a kind of taboo in the Judeo-Christian mindset. As Japanese parents stop having sex regularily after their children are born, that isn't a problem.
For international couples who do continue, I was told little babies can sleep very well even with the parents doing whatever they please right beside them. But they should have their own room from age 3 or 4 then.
Finally, lots of Westerners think it might cause psychological problems to the children to sleep with their parents. But Japanese do it and seem to be alright with it. The only drawback I can think of is the independence factor. Japanese are very group-minded and usually have difficulty thinking by themselves. It may be related.
Why do Japanese women stop working when they get married or pregnant?
1) It's in the culture like that. They usually want to. Most Westerners think they are forced to quit, but they often resigned from their own will (or from what society has inculcated them). Japanese men also prefer that their wife stay at home once married. Women almost always want to spend as much time as they can with their babies (remember J-girls like what is "kawaii" ? The connection is evident).
2) Nursery schools are few and very expensive in Japan (I've heard about 200.000 yen/month). It make more sense for the mother to stay at home than work and pay almost all her salary for the nursery. In most Western countries, nurseries and kindergartens are free, which allows lots of mothers to work.
3) Paternity leaves don't exist in Japan, and (paid) maternity leave are not encouraged.
Japanese relation to sex
There is a kind a tacit understanding between spouse that after 10 years of marriage (loveless anyway) and a few children, the man is free to satisfy his libido somewhere else. That is why the sex industry is so prosperous in Japan.
Male literature in combini is 90% porn and everyone reads it openly (and shamelessly) anywhere. Even serios newspapers have their pink pages. This is just beyound belief for Westerners first visiting Japan.
Japanese men who miss talking to young and cute girls (or not so young and not so cute, depending on the price and place) go to hostess bars or "snack" after work. Nothing much happens there except dirty talk. Those who want to go more carnal have the soaplands and massage parlours, but Asian men's testosterone level is reputedly lower than Caucasian or African men, so they are often satisfied with just talking, watching - and groping...
There is also the infamous "enjo kosai" or teenage prostitution. I'd like to say that for lots of Japanese (or East Asian) women, this isn't even considered as prostitution. Many find it normal to have sex with a man that pays them whatever they want. Remember that marriage is not much more than a man giving almosy all his salary to a woman to make children and take care of them. It suely sounds utterly shocking to lots of you, but after talking to (female) Japanese and other Asian friends I know quite well, they don't even see it as abnormal. It's in the mores, that's all. That doesn't mean Japanese women cheat more, but lots of them certainly consider money as more important than love or sex (which I find very saddening).
Behind this, I've realised that cuteness (the kawaii factor) iss very powerful in Japanese women's mentality. They like babies, cute anime characters and cute clothes more than anything else, it seems. Men have an obsessive care about their job and status. My impression is that this stereotype works as well for Korea and China, if not also South-East Asia.
Stolen from the Jref.com forums