Can i still teach english in japan with an industry pathway?

I am in my 2nd last year of schooling (grade 11) in Australia, and i am doing an OP in illegible pathway, i had to change over because i was struggling with the OP subjects. I really want to attain a job overseas (in japan) but, i have heard that. to get into some schools around Osaka.. you need to have a teachers qualification. i would like to go over to japan when i am 18 so i can get the gyst of it all. and know what living there will be like, what i would need etc. i am currently studying japanese on my own account as the school i am currently going to is doing chinese.. so please, i would like to know how i could get there..? any options or advice? thanks. =]