Goodbye
expression
I saw your Nara (さようなら), but I then had to say goodbye. It was just a short trip, but at least I saw your Nara. さようなら is a formal way to say goodbye, so a good word to use with colleagues and teachers. A quick tip before I say goodbye: さようなら often drops its middle う, becoming さよなら.
先生、さようなら。
Goodbye Sensei.
さようなら、一月。こんにちは、二月。
Goodbye January. Hello February.
さようなら、今までサカナをありがとう。
So long, and thanks for all the fish.