How To Say Good Morning In Japanese Youtube
Learning to say Good Morning in Japanese: Ohayougozaimasu, Ohayou
The Meaning of “Ohayo (Gozaimasu)” in Japanese (Greetings)
Japanese Greetings
You should pick it up quite naturally, because of how often it is used.
Another point you might have noticed or heard is that Japanese people bow even when they are on the phone and their interlocutors cannot see them.