life in tokyo vs osaka vs nagoya as a international student.

I plan to study in japanese launguage school first and then In japanese University eventually. Is 28hrs per week part time job enough to pay for expenses in ‘takhadanobaba’ or ‘ikebukuro’ area In tokyo ?!
And, considering living expenses are too high in tokyo, is osaka or nagoya OK in this regard.
At least in nagoya or probably osaka, I feel like with some informed guesses, that I can pay the bills with the part time job
What are the pros and cons tokyo, osaka, nagoya in this circumstances ?!
I come from a South Asian country, so I have to sustain myself on my own , i have equivalent to few hundred thousand yen extra for emergency money outside of the necessary costs associated with launguage school, dorm(6months) and 15 to 20万円 .

Thank you for taking your time.