And nope, the same is very much not true about getting a Japanese boyfriend. You'll get the odd couple of guys who're excited to try out their English, but generally, Japanese men seem to be really intimidated by gaijin women. When I go out I get hit on by loads of Japanese men, who want to try out their English, but they disappear fairly shortly afterwards.
I can imagine that though, especially when the woman is on average a foot taller than most Japanese guys around her. I've had quite a lot of Japanese middle-aged people (men too) come up to me and just start blurting out random English scentences; for some reason if you're white in Japan you're expected by everyone to be able to speak English. The weirdest time was when I was on the train and some random guy came up to me and just started mentioning random country names, probably expecting me to keep saying 'no' until he hit the right one
In Korea I went to visit the royal palace in Seoul once, just when they had this school trip organised for some local primary school children. Korean primary school children are different from Japanese ones in the sense that instead of just waving to the foreigners they see, they're much less reserved and actually start talking/screaming at them. I wonder if the teachers actually encourage the children to practice their newly learnt English phrases on foreign people when they see them. Now I kind of know what it's like to be famous though, there really were a ton of school children there and I couldn't turn a corner without running the risk to have a group of them come up to me and start asking questions like 'hello, how are you doing' and 'where are you from?' en masse... I even had to shake hands. It was ok the first 2 or 3 times because the kids were kinda cute, but after that it got somewhat annoying :p