My wife is Japanese so we get quite a few of them calling here. My Japanese is OK but when they hear a foreigners voice it's like they can't speak Japanese no matter how lousy their English is.
Anyway, ending a phone conversation with a Japanese person is almost like a battle of wills. It's considered rude to just hang up so they keep saying goodbye until someone hangs up. Typical conversation:
Me: Ok, so I'll tell her you called.
Them: Oh, oh, san kyuu (thank you)
Me: Alright then, goodbye.
Them: Oh, uh...
Me: What's that?
Them: Oh, uh. No. Nusing moah (Nothing More)
Me: OK. Goodbye.
Them: Uh, yes. Eetoo (They're Thinking)
Me: What?
Them: Uh, nani? (What)
Me: Nothing. Goodbye. (Hang the fuck up already!)
Even people we've known for years who are very Americanized will call and do the same thing over and over.