I was wondering how much you knew about homestay when it comes to money...

I'm interested in studying BA Japanese in London, but obviously i will have a compulsory year abroad in Japan while doing this course...
I'm pretty sure i would get some form of advice from the uni (if and when i get the course), but i wondered what you knew about funding?

I saw how much homestay is a week roughly, but that's gona mount up pretty high for a year!

I tried to look for information on the uni website but all i seem to find is that they don't have anything to do with the year abroad, and no tuition help is offered by the uni >....<

Is it possibly to get some kind of help with funding things in Japan if i'm there as a student?
Or would it be better to get some kind of help funding this from my own country (after finding out what i need to do)?
I'll obviously try to save as much as i can but i doubt i'll have the total amount saved...

Your advice would be a HUGE help! Thanks! ^^