[Cheers]

The most important thing is to be able to speak the language properly and function within the culture.

That is tough enough. A degree is important if you have the motivation and wish to become successful and rich.
The lack of money would be a consequence some of the people without a degree would gladly live with.
Do you actually realise that you are putting your priorities on others?

It´s easier with a degree, but that´s about it. It´s not so special after all. I know more than enough unbelievably dependent people with a degree and hard- working, wonderful ones without one. The kind of job you have in the end does not have to influence your success in Japan. Success being wellbeing and comfort.