How about teaching English in Japan?

Always all class is held in English only.

You'd better much more be aware of how you use a standard English like 'Did you go to America' instead of saying 'Did you "went" to America?

Or you ought to pronouce 'visit' like vi-zit, not vi-sit. Bro-th in the, that -er, not bro-th in thin, thick -er. You have no problem If you can succeessfully correct Philipian particular way of speaking in Filipina English.

I think it's better for you to come to Japan first.