Moving back to Japan for language school but struggled with previous attendance rate

Sorry if the title is confusing but I’m planning to move back to Japan to apply for vocational schools. I attended language school for 18 months 2023-2024 but due to some hospital visits and other sick days I left the school with an attendance rate around 75%

I want to apply for 6 months of language school and while I’m there I will make up my attendance rate, improve my Japanese, and apply to vocational schools. I’m worried though because I know Japan immigration likes an above 80% attendance rate.

I’m sorry if this is a dumb question I’m trying to figure out what to do.

by bon-bubbletea