(latest expressions towards the top...)
Ja ashita ni : see you tommorow
Mata ashita : see you tommorow
Mochiron : of course!
Kore wa watashi no denwa bangou desu. : This is my phone number.
Itsudemo denwa shite kudasai : Call me anytime.
Tadaima: I'm home!! (lit. just now)
Okaeri: Welcome home...
Gomen nasai: sorry
Gomen ne: sorry(casual)
Gomen na: sorry(casual, guys only)
un. : yeah
Onaka ga suite imasu ka? : Are you hungry?
Yokatta: that's good.
O-i or Yaa: Hey! or Hello! or Hi!
Jodan: just kidding
Ano... : um...
Odaiji ni- Take care of yourself!
Ki o tsukete: Take Care! Be Careful!
Ohayo Gozaimasu (or just 'ohayo!'): Good Morning
Konnichiwa : Good Afternoon
Kombanwa : Good Evening
Hajimemashite : How do you do? (lit. 'our first' said when meeting someone for the first time)
Watashi wa (your name here) desu. : I am (your name here).
Doozo Yoroshiku : Pleased to meet you.
Ogenki desu ka? : How are you?
Okagesamade genki desu : Fine, thanks to you.
Maa maa desu : so-so
Domo arigato gozaimasu : Thank you very much
Doo itashimashite : you're very welcome