have you not heard of a thing called cash? Use the bank account from the country you came from? What country do you know, where you are on a tourist visa, will give you a bank account?
Maybe it depends on where you apply. I applied in Tokyo and they just needed to see a certificate of my bank balance at the time, it didn't need to show 3 months before or anything like that. If you apply somewhere with the same rules at Tokyo, then perhaps you can ask your parents to put the money in your bank, get a certificate of bank balance and then pay the money back to your parents right after that. Good luck 👍