Listen to the native speakers greeting each other, and then go ahead and practice saying each Japanese phrase aloud. Once you’re feeling confident with Japanese greetings you’ll learn some different ways to say goodbye in Japanese as well.
Resources for further reading:
Common Japanese Greetings
Practice Your Pronunciation With Rocket Record
Greetings like “good morning” or “good afternoon” are incredibly important in Japanese. As the Japanese culture is more formal, going through the ritual of greeting another person is an important way of showing respect. Japanese tend to bow while saying おはよう ございます (ohayō gozaimasu) "good morning," こんにちは (konnichiwa) "hello," or こんばんは (konbanwa) "good evening."
Broadly speaking, bows can be divided into informal (around a 15 degree angle), formal (around a 30 degree angle), and very formal (a deeper angle bow). It's polite to greet every person individually, even if they’re in a group. That means that if you’re walking along the road and pass a group of five people, you’ll have to say こんにちは (konnichiwa) "hello" and bow five times!

Informal Japanese Greetings
When speaking to a close friend, it's common to use short greetings like やあ (yā) "hi" and よう (yō) "yo." Listen below to hear some informal Japanese greetings.