How much living cost in japan for undergraduate students

Hi, I am from Uzbekistan and currently applying to japanese universites. I have 1460 sat and 7 on ielts (planning to retake) and some ec's. I am applying to tohuku, utokyo, waseda, and ritsumeikan (I hope i can get in and win some scholarship). Currently, reading some reddit post concerning me can i afford living in japan because average is around 90-120 jpy if i save and normal how much it can reach. Additionally, can I cover my expenses if I work there?

Thank you for your response

by Top-Application219