It's all a bit crap really.
Brace yourselves, this is gonna be long
So I'm half black and half white. It annoys me enough that I get classed as black when I'm NOT, I'm MIXED RACE. If one person wants to call me black, someone else might as well call me white. Wtf. Mixed race. Deal with it.
Because of that, I've always been fascinated with black and white culture not because of what it is, but because of how it works.
Ie, people think of me as black. Therefore, I must like hip hop and fried chicken and only want to date black guys. I get approached in the street all the time by black guys. Stereotypical rapper types. But I'm not interested in black culture. Not to say I wouldn't date a black guy, but really, if there was a black guy who wasn't so stereotypical, he's probably gonna steer away from me too, because he's probably trying to get away from that image as well. He'd probably rather date a girl of a different race.
It annoys me that sometimes my 50% black heritage is too much to fully fit into white community... and I live in one of the most multicultural places in England so I can't imagine what it's like elsewhere. I don't find it offensive as such but just annoying because peolpe always assume that I want to date a black guy so guys of otehr races dont approach me and I miss out cause I'm too shy to make the first move. It's like, man, do I look like I give a shit about race? My friends are from all backgrounds. Sheesh.
Similarly, if you're white and imitating black culture, people are like 'that's wrong etc etc' but I mean, why can't you? Just because you're born into one race doesn't mean you can't like the cultures of another one.
So to bring it back to the wannabe Asian subject...
Yes I've been called that. But to be honest, I dno't think it's very fair. I think it's stupid when people think they ARE Japanese or they think they can speak Japanese (cause as has been said, it's nearly always Japan) or they think Japanese people are superior to everyone else or something. But I don't see what's wrong with someone dressing in Asian fashions or watching animes or whatever.
I like Asian fashion... especially Korean and Japanese. I want to go to Japan with a group of friends for a year next September, so I'm learning Japanese. i like to watch animes. Occasionally I slip out a 'ne?' ot something, but I also speak random bits of French in conversation. I'm just a worldly person. I'm obsessed with French stuff as well and I sometimes write pages of French in my notepads just because I like it and I can. If I was at that level with my Japanese I woudld o that too... but by no means do I think I'm French/Japanese/Korean/Spanish/Brazilian/Australian/Italian/whatever other countries I'm interested in.
Although I actually am Italian

My grandmother was Italian.
But yeah. Long story short: I think the whole thing just needs to be relaxed. In my opinion it kinda borders on racist... and I think it's stupid how it's un-PC for a white person to say that an Asian/black/other non-white can't be like your average white person, but then you're only allowed to be Asian if you actually are Asian, if you get what I mean?