Just had a funny thing happen and I thought I'd share.
I play in the same time zone as Japan, so I'm used to being ignored when I'm trying to build a party. I usually try and think positive and just assume that when I don't get a {No thanks} that they are afk. Anyway, I send a tell to a japanese WHM who is lfg and get no reply. No biggy, just try the next WHM down. Anyway about 5 minutes later I get a japanese tell from the WHM followed by a {mistake}. BUSTED! I knew they just ignored me all the time. I sent a tell back saying <-- Australian {I'm sorry. I don't speak Japanese} and suddenly the WHM is sending me tells apologizing for not replying. To top it off, his english was actually pretty good.
I don't get where their NA hate comes from. There are good players and bad players from both countries, and it's just plain rude to assume every english speaking player is NA and therefore don't even deserve the effort it takes to say {No thanks} to a party invitation.
JP Only in seacom? Fine, I won't ask because I don't speak japanese. And hell if you're gunna be the only japanese person in the level range seeking and would rather lfg for another 8 hours than *gasp* party with some people that speak a foreign language, all the power to you, that's commitment.