>>940053440
Man, I feel for you bro. The first thing I told my girl when we're dating was that I'm American, and not to expect to be the typical Japanese wife who doesn't have to have sex after the first baby. We've been together fifteen years, and I still have days where I choose what she wears for me, still text dirty to her, wears butt plugs for hours while we're out, swallow my load, and even sleeps on her side so I can spoon her with my cock up her ass.
Many guys I know ran into the same issues as you when they married chicks from Japan. One kinda broke out of the rut by finally telling his wife that he refuses to have a side girl, and therefore needs to have sex "his way" one time a month. It was basically soft rape with a safe word, and while she didn't want to admit that she enjoyed it, it started becoming a more regular thing for them.