"All of my Japanese friends have wives that are 10 to 15 years younger than they are. In Japan, the ideal marriage is one in which the husband acts the role of the father, so the wife needs to be young to accept the male dominance over them."
I suspect that in another 10-15 more years most of those marriages will have failed. And it will be the women who will become disinterested.
"I suspect that in another 10-15 more years most of those marriages will have failed. And it will be the women who will become disinterested."
No, this is just their cultural norm. You are thinking in western ways, but you can't compare easily. You are thinking married men and women in Japan grow apart over time, but I think the opposite is true. Many Japanese women still want someone older and financially established who will take care of them and their children and it has worked that way for a very long time when Japan was isolated. Some things have held over in the last 2 or 3 generations after WWII, but culture there is now changing rapidly so that couple's ages are more similar and more women have careers outside the home. This new way puts much pressure on young Japanese males to be successful early, so they avoid dating and marriage to avoid the pressure. It is a bit convoluted and hard for us to understand, and even the Japanese have a hard time understanding. Heck, I have a hard time understanding in our culture how young people can simply "hook up" and still be just friends without it being complicated with a relationship. Dating seems to be a dying art.