Hello Jack,
Just curious; you are getting an English teaching degree so you can come to Japan, or you are getting an English teaching degree because you are passionate about it and/or see it as a rewarding way to spend your life (and teaching in Japan is a potential side benefit)?
Bonus points to you if you have spotted the glaringly obvious loaded question in there.
It is this geezer's way of advising you that teaching in Japan can be a great gig if teaching is your passion. If your only passion is "Japan" and teaching English sounds like a low hurdle for you to jump in order to get to Japan, I would caution you to think more seriously about your future. Apologies for the unsolicited and possibly gratuitous advice.
Another bit of gratuitous advice: avoid starting sentences with the word "So". It has to be one of the worst affectations to have taken root in the English language in the last 20 years. I cringe every time I see it on this forum (and it happens so frequently that I spend a lot of time cringing). Almost every sentence is instantly improved by the deletion of the bloody word "So" from the beginning. It makes the slightly politically incorrect and unnecessarily chummy "Hey guys" look like an absolutely charming opening by comparison.