The Immigration Bureau of Japan (Ministry of Justice) has announced special measures for those who have difficulty in returning to their home countries due to the effects of COVID-19.
In addition, until now, only those who graduated/completed after 2020 were eligible for this special measure, but from October 19, 2020, it has been applied regardless of the year of the graduation/completion. (The eligiblity has been expanded).
If applicable, please contact the nearest office of Immigration Bureau of Japan.
https://www.moj.go.jp/isa/content/930005849.pdf