Help getting a SIM card before actually having a bank acc in Japan

Hi, so I am a student in Kyoto doing a undergraduate major program for 4 years.

These are my doubts:
1. I’ve already did most of my paperwork regarding ward office procedures like getting my Residence card and putting an address to it, Health insurance number, I already have my Student Id and housing too.

1. I haven’t opened a Bank acc yet since everyone in my dorm are gonna go next week to open their accounts in a specific bank.

2. My seniors told me I need a credit card in order to do a contract with a SIM provider company, BUT I only have a debit card from my home country (Peru). I could use my parents credit cards, but they are also from my country and idk if they will be okay with it.

I will be going to get my SIM card tomorrow with a senior that speaks Japanese, so he will help me with the contract.

Therefore, does anyone know if I will be able to get my SIM card and which company should I make a contract with?
Neither price or language are problems. I need to know if my payment methods will be accepted or if there is another way to pay for it, I also have a good amount of cash with me.

Thanks everyone!

Pd: Does anyone know how do I get a commuter pass? I’ll be using the Kyoto City bus a lot and my University just gave me like a sticker with my Student ID so I can get some type of discount? Idk smth like that.