Because there were so many japanese people they could conquer someplace then then a couple of troops behind to colonise and guard.
It would depend on the person. If a person doesn't have much it could be as little as a suit case and some money, or as much as a moving van and a car packed full of clothes.
A. Spain have a nice day !
I think there could be many answers. For example Horn of Africa, by sea, or just by trade routes
