I certainly think marriage is hard enough without the complications of marrying someone from a completely different culture!
In the area I live there are many mixed racial couples who are married. Mostly Japanese women with foreign men but a few foreign women with Japanese men. Most of the successful foreign business owners in town have Japanese wives who have been very instrumental in their success here. Over the years I've been here I've seen a few fail but I've also seen many flourish and our little town here is full of cute little halfs (that's what racially mixed kids are called here). I've even known couples who are married where neither speaks the others language fluently! As though communication in a marriage isn't hard enough!! I also know of a few mixed marriages where they remain married but are not overly close. The husband provides the money but would rarely sleep with his wife anymore and seeks out other sexual partners. The wife raises the children and lives a pretty good life probably seeking out her own little affairs from time to time. I also know a few couples who probably would never have dreamed of getting married but did so after becoming pregnant.
There are quite a few of the sort of women described in the article working here as well. They have come here purely for the opportunities to work in a foreign owned company rather than a Japanese one (many have told me that). They aren't always also looking for a foreign partner though.