University degree or not

Hello, I'm from a third world country, and i have this doubt about university degree and working in japan.

Here salaries are low and things expensive, making the 20k+ USD for japanese academy + plane ticket + rent + food, etc, will take me around 5 Years. Currently I'm 19 years old, i have highschool degree, my plan were joining the army in my country, make the money, move to japan, finish japanese academy, then finding a job in a factory, but apparently i need university degree for working visa, or at least it is way harder to get visa without it, if i go to university that's 4+ more years.

How necessary is university degree?
Do i still have options without it?
Is my plan unrealistic?

Thanks.

by Accomplished-Owl914

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