How do you say hello in japenesse?

Japanese it a very polite language, so depending on the time of the day your greeting would be different.

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Morning (informal) = Ohayou

Sound like = oh-hi-oh

Spelling = おはよう。

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Good Morning (formal) = Ohayou gozaimasu.

Sound like =oh-hi-oh go-z-eye-mas

Spelling = おはようございます

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Good Afternoon = Konnichiwa

Sounds like = K-oh-nee-chee-wa

Spelling = こんにちは。

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Good Evening = Konbanwa

Sound like = how its spelled but the second n is hard to hear.

Spelling = こんばんは。