The ones working illegally will absolutely not be so publicly visible. They'll be doing construction, factory work, trucking, night work, etc. I have no idea a

The ones working illegally will absolutely not be so publicly visible. They'll be doing construction, factory work, trucking, night work, etc. I have no idea about stats of "illegal immigrants" in Japan, because that could mean working outside of your permitted work, having no or an expired residence status, etc.