>>5
I'm from the US, but the Japanese female is said to be choosy about man's income when she decides to get married, so that it's pretty rare for her to marry a man of lower income than hers.
Nevertheless, I knows some couples of Western males and Japanese women, and those husbands earn not so much in general. Moreover, some of them don't have a regular job. Their family budget depends on Japanese wife's income mainly, and besides, she serves her white husband quite humbly too. In my eyes, such husbands are nothing but gigolos.
Thence, we can conclude that Japanese women in general regard Caucasian gene (that is, just being a White male) as much more precious than earning average income.