How do you say hello in Japamese?

The most common way to say "hello" in Japanese is こんにちは (konnichiwa).

Here are some other ways to greet someone in Japanese, depending on the context:

* おはようございます (ohayou gozaimasu): Good morning (formal)

* おはようございます (ohayou): Good morning (informal)

* こんばんは (konbanwa): Good evening (formal)

* こんばんは (konbanwa): Good evening (informal)

* ただいま (tadaima): I'm home (used when arriving at home)

* お元気ですか？ (ogenki desu ka?): How are you? (formal)

* 元気ですか？ (genki desu ka?): How are you? (informal)