Talk:D Episode 1: Uh-oh! An Impact Monster is Born!/@comment-24971427-20160402051118/@comment-11372432-20160402082455

2) (ignoring all else) He's been there longer than the law was even made, I'm sure. You can't break a law when the law doesn't exist yet. It's how the Omnis aren't on the wrong side of the law, same with him.

Basically, they were in Japan possibly before Japan was even a thing.