That is not Japanese, you might mean 'konnichiwa' which can mean 'hello, good day etc' and is used as standard greeting during different times of day.
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"
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?"
devil in is akuma de unless you mean inn
"Tanjoubi omedetou!" is a Japanese phrase and in English it means "Happy Birthday!"