RitAPU in Japan suspended me for “unlicensed driving” because I forgot my physical IDP at home.

I’m a student in Japan on a scholarship. Recently, I was stopped by police while driving. I have a valid license from my home country and a valid International Driving Permit (IDP). However, at the moment I was stopped, I didn't have the physical IDP booklet on me—I had left it at my apartment.

I later presented the valid documents to the authorities and verified that I am legally licensed to drive. Despite this, my university has officially cited this as "unlicensed driving" (mumenkyo unten).

As a result, they have:

• Suspended me for 1 quarter.
• Revoked my scholarship for at least 1 semester.

I have already filed an appeal. I’m looking for advice on:

1. Legal distinction: Is it legally accurate for a school to label "forgetting a document" as "unlicensed driving" if the permit itself is valid? In Japanese law, isn't there a difference between Mumenkyo (unlicensed) and Keitai Wasure (forgetting to carry)?
2. Appeals: Has anyone successfully overturned a university disciplinary measure in Japan?
3. Visa/Scholarship: How does a 1-quarter suspension usually affect student visa status?

I’m really stressed because this feels like a massive overreaction for a clerical mistake. Any insight from people familiar with Japanese traffic law or university administration would be huge.