Teaching English in Japan without a university degree
 

First of all, is it possible?
Second, if so, where would these jobs most likely be? (assuming Tokyo and other big cities, but could be wrong)
I heard that you definitely need a uni degree to work in Japan, is this true?
I know working holiday visa is possible to work without a degree, but it's only good for one year, and you can only get it once.

I also heard that if I got married (not for a long time), that I would have a spousal visa, and wouldn't need a company to sponsor my visa, meaning I would get a job a lot easier, even without a degree?

is this correct?

Any information or suggestions would be great.