TEFL+Spouse Visa

Would the combination of a TEFL and Spouse Visa be enough to get at least an entry level teaching job in Japan?.

I want to make sure I have some type of job security before moving to Tokyo, even if it were to do private lessons or small classes.

Yes.

However, without a degree and Japanese language proficiency, you will be stuck in entry-level teaching gigs until you die.

Im studying Japanese daily, and intended to actually enroll in a language school once I'm in Japan, it is hard to learn in America because everyone speaks English, once im in a location where I have no option but to learn Japanese (and i actually enjoy it too mind you), it should be easier.

One more thing i was wondering actually...
I know as far as a main job, you can't work online for a US based company...but if I were to pick up Teaching full time, would it be illegal of I still work online part time, or even full time if the hours don't conflict?.

Or would it even matter since I'll have a spouse visa instead of a work visa?.