Good morning = ohayo gozaimasu (おはよう ございます)One can also say just "Ohayou(おはよう)". This is casual, and should not be used with one's boss.Good afternoon, Hello = konnichiwa (こんにちは)Good evening = konbanwa (こんばんは)Goodnight = oyasumi nasai (おやすみなさい)Unlike English, it is mostly used before going to bed.Goodbye = sayonara (さようなら)Sayounara(さようなら)" can be also used instead of "sayonara(さよなら)." People do not say "sayonara(さよなら)" when leaving their own home. "Ittekimasu(いってきます)" is normally used. The response to "Ittekimasu(いってきます)" is "Itterasshai(いってらっしゃい)".See you later = dewa mata nochihodo (では また のちほど)"Dewa mata(ではまた)" is also often used as "see you later", similar to the English expressionHow are you? = o genki desu ka (お げんき ですか)Fine, and you? = genki desu. anata wa (げんきです、あなたは)Pleased to meet...