pursuing both studies AND having a student or part-time job

Hello! I'm considering applying for a scholarship to study and research at a Japanese university. I'm targeting the history/art history field (the project isn't currently more specific since I won't be able to apply until next year or the following year).

I'd like your opinion on: pursuing both studies AND having a student or part-time job.

-Is this realistic given the expected demands of university work?

-Does it hinder academic success? (In terms of time spent studying, exam requirements, etc.)

I suspect that the more time you have available to study, the greater your chances of success. However, I would be delighted to hear your feedback: the mental load, the financial burden, the stress, the successes, the failures, and what works best.

I had successfully completed my Master's studies in France by having student jobs (and even a year as an employee), so I am writing to you with the hope of a rather positive, but realistic, feedback on the potential differences of university work.

Thanks in advance for your time and advices !