[GTJ]

Sponsorship is very tricky.

Can I ask why your'e on a tourist visa (temporary landing permit) if you're enrolled at a University? You should be on a student visa if that's the case... hmm...

Cheers to Sangetsu for a fantastic explanation. I have very little to add to that but I will what I can:

Sponsorship is, like I said, very tricky. The minimum requirements are a bachelor's degree from a 4-year institution, a signed contract from your potential employer, and a minimum salary and number of working hours that will be determined by the Ministry to be sufficient to support yourself in Japan (so you don't end up homeless and a liability to the country, apparently).

Your timing is tough and I know exactly how you feel because I was in a similar situation. You have to face the possibility that you might just have to go home for a bit. I think unless your'e willing to wade through the swampy pool of eikaiwa (ECC, Gaba, Interac, Aeon, etc) back in your home country (which takes a LOT of time), find a way to be in Japan to look for employment in person. I'm guessing your ticket back home is non-refundable at this point, otherwise I would say get a flight to Korea, then back to Japan after a few days to get another 90 day temporary landing permit and look like crazy for work.

Of course, though, this becomes expensive because if you come into the country on a temp. permit, you need to have a plane ticket out or they won't let you in. So buy two tickets, and if you get a job, refund the other.

Hope this helps!