I've been dating a Japanese girl for six months now, and it's been going great. I was warned that there might be some problems when I met her family; if they didn't like me or hated non-Japanese, I should consider the relationship to be over. But when I met them, they received me quite warmly, and I often go to their house and wind up spending the night there (in a separate room from my girlfriend, of course :'(). I also brought my parents over to meet them when they came to visit me, and that went off incredibly well.
Her parents even inivited me to come and meet some of their extended family during the Obon holiday, which I did; I spent the entire day with her parents and some of their cousins/siblings, without my girlfriend even being there (she had to work). They're almost like a second family to me now; it's kind of scary, but considering the way things have been going with both my girl and her family, I think I'm going to end up being married to her within a year or two.
Quite frankly, I think I'd be all for it; we just get along so damn well together, but obviously, no need to rush.
Tomorrow we're both going to go on a week-long vacation to the States. I'm going to show her around Atlanta, and she's going to meet my family and friends. She's incredibly excited since this will be her first time in the U.S.