Jap, Nip, slope; the last for Asiatics in general. All that I'm aware of. Not a lot to object to in the Japanese, as long as they're not at war with you.

edit: Also, you might as well just call him a big faggot, or a huge queen, anyway. Everything wrong with former Sulu has nothing to do with him being a Nip, and everything to do with him being a huge American Faggot.

Jap, Nip, slope; the last for Asiatics in general. All that I'm aware of. Not a lot to object to in the Japanese, as long as they're not at war with you.