It is a colloquial way to say 'see you later.'
'Jaa, mata ne!' is an appropriate phrase that carries that connotation.
This does not appear to be Japanese.
"Byouin" is a Japanese phrase and in English it means "Hospital"
"Tanjoubi" is a Japanese phrase and in English it means "Birthday"
"Asu" is a Japanese phrase and in English it means "Tomorrow"
"Kinou" is a Japanese phrase and in English it means "Yesterday"
ja mata in Japanese means see you later.
and doesn't yatta mean something like that?
what does it mean in English and i may be able to help you
Demon means Oni in Japanese also mean folklore.
"Dokoe ikimasuka" is a Japanese phrase and in English it means "Where are you going?"
"Korewa ikura desuka?" is a Japanese phrase and in English it means "How much does this cost?"