“From what I’ve seen, yes incest is more prevalent in Japan.
Japanese have clubs like Kinshinsokan Monogatari… Basically having sex with your mother fetish clubs. I have seen these clubs all over Tokyo. The prevalence of such clubs would be inconceivable in many Western countries.
It is not to say that every Japanese guy has sex with his mother. No, that is not the case. It is to say that the conditions and the opportunity for incest to happen is greater in Japan, than in many other countries.
The concept from which these clubs come from are ingrained in Japanese culture, where the Japanese mother sexually satisfies her son.
There are multiple factors and reasons for this, that differ greatly from Western culture.
1. Japanese mothers are well known to play with the penis of their son’s. Via hand manipulation or with her mouth. This is a quasi-cultural custom that many Western countries don’t have and don’t know about.
It can be done jokingly to see the baby boy or boy get an erection, as play (a higher form of tickling), or even as a reward mechanism (for some task or thing he did well).
2. Japan had the system of exam hell, where you must score well on your college entrance exams to get into a good college. So some mothers would sexually satisfy their sons, so that they could focus on school and not girl chasing.
The performance on these exams, could be the direction of where you life is going. It was extremely important to many Japanese families to have their sons do very well. There is less pressure now, because due to the economy, college entrance requirements are lower.
Some Japanese mothers would consider it her duty to “sacrifice her body”, so that her son would be sexually satisfied and could focus on his studies.
3. Absentee Japanese fathers, who stay away from and at work too much, which created situations where their wife wants sexual satisfaction and are tempted by their son.
This is compounded by the “shy”, withdrawn, and at times anti-social element of Japanese culture.
The wife and mother would not or could not find a lover or sex-friend outside the house, however she could be highly sexually frustrated. Combined with a high hormone and sexually interested son… 1 + 1 = 2.
4. There are mothers who would actually use sex as a form of control over her son.
There is the “carrot or the stick”. Many Westerns think only in terms of using the stick, belt, or various forms of punishment. However, there are Japanese mothers that decided to use the “honey pot” to get there boy doing what they want or to behave.
5. The relationship that Japanese boys can have with their mother, is not necessarily in the same context as Western ones.
In Western cultures, there is more anti-sex issues because of religion and more pushing the boys to be more macho, and even violent. Being a momma boy is seen as uncool and scorned more in the West.
You have less of that in Japanese culture, so you can get boys with stronger “momma boy” complexes and stronger attachment to their mother. Such overly strong attachments to the mother can become sexual, and especially if there is anything to “tip the scale”, like an absentee father or sexually frustrated mother that doesn’t want to go outside the house.”