how do you say these word in japanese"how are you?"?

Answer 1

Ogenki desu ka?
(pronounced genki des ka)

Answer 2

To be honest, you don't. Japanese people don't ask each other that.
Typically, Japanese people just greet each other with "good morning", "good afternoon/day" and "good evening." And that's it.
But, occasionally, Japanese people will ask each other "genki?", "genki desu ka?" or "ogenki desu ka?", all of which mean the same thing and differ only in levels of politeness. Essentially, "genki" means "power" or "energy", so it's the equivalent of asking them if they're doing/feeling well. But it's only used when two people haven't met each other for a long time, or when the other person doesn't look well.

Answer 3

In response to an earlier post, hajimemashite is only used when you meet a person for the first time, so it's not how are you. like the other answers, it is usually "ogenki desuka?" (very formal) or "genki?" (casual)

Answer 4

There is "Ogenki desu ka?" but it's not a very common question to ask in Japanese culture.

Answer 5

"Hajimemashite?" is "How do you do?" if that's what you're looking for. Saying exactly "How are you?" isn't quite right. That translation is "Genki desu ka?" which is referring to power (genki). It's rarely asked. Hajimemashite is closer to what you're looking for, I think.
Hope that helps.