[xYinniex]

go to japan first.

You're from england right? you can apply for a working holiday, in which you can come straight out of high school and apply for one.
Learn language first and then live there for a few months and try pick up the language through working with different working experiances.

try out different jobs, check out japan, see if you like it.
go back home, go uni, and if you really have your heart set on it, and you really like japan, go for whatever job you desire.