noun
illegal overstay; overstaying one's visa
Legal term for remaining in a country beyond the permitted period of stay. Often used in immigration contexts.
不法残留で強制送還されるケースが増えている。
Cases of deportation due to illegal overstay are increasing.
彼は観光ビザで入国した後、不法残留を続けていた。
He entered on a tourist visa and then continued to overstay illegally.