How do you say I'm going home in Japanese?

Answer 1

There are two possible translations that depend on context for this sentence. The first is assuming that the person is in the process of coming home (i.e. driving home, on the train, etc.) and would be帰ってるん� (kaetterunda).
The second assumes that the person hasn't been home in a while (overseas, etc.) and is informing someone that they're returning. This would be帰ってくるん�よ (kaette kurun da yo).

Answer 2

只今 - Tadaima = Essentially meaning, 'I'm home'

Answer 3

Casually: 帰る (kaeru)

Formally: 帰ります (kaerimasu)

Answer 4

'Tadaima.'