From wikt:hello: greeting * おはようございます (ohayō gozaimásu = good morning, polite) * こんにちは (kón'nichi wa = good day) * こんばんは (kómban wa = good evening) * おはよう (ohayō = good morning, informal) answering the phone * もしもし (móshi-móshi) is anyone there? * おーい (ōi = Hi, Hey, formal and informal) * すみませーん (sumimasēn = I'm sorry, formal) * ちょっと (chotto = Hey, informal) sarcastic- that was foolish * やれやれ (yareyare, formal and informal) * やれやれだぜ (yareyare daze, informal) * 大丈夫? (daijōbu? = Are you all right?, formal and informal) * 大丈夫かよ (daijōbu kayo? = Are you all right?, more informal) * マジ? (maji? = Are you sure?, informal) * マジかよ? (maji kayo ? = Are you sure?, more informal) expression of puzzlement * 本当? (hontō, Sure?, formal)