How do you spell hi in japan?

Answer 1

こんにちは : 'konnichiwa' is Japanese standard/common daytime greeting and closest equivalent to 'hello, hi'. More informally and in spoken language only, it can change to 'konnichi' or 'konchi', being closer to 'hi, what's up, etc'. A very colloquial and masculine term for casual greeting would be おっす : 'ossu'.

Answer 2

You can spell it like this:

やあ

Answer 3

"You-ko-so", although the "u" isn't spelled.

Answer 4

Kon'nichiwa