What’s the timeline for switching from a Student visa to a Working visa?

I'm currently on a Student visa and in a Japanese language school in Tokyo until March 2026, and would like to start a job after that.

Supposing I don't find something that immediately starts on April 1, is there something like a grace period I can use for job hunting? If I remember correctly, I can't stay on my Student visa while I'm not actually in language school.

If there is no such grace period, it looks like I have to start job hunting now and take an offer that might force me to quit language school before finishing it, but I wouldn't want to do that, unless it's my only option.

Did anyone do something similar and can share about their procedure and experience?

by goddammitbutters