this is one of those fun things to joke about since nobody actually knows the answer. maybe they live in a summon city where gamabunta runs a gangster organistation and cover it up with a ramen shop, Manda is the ugliest assasin in town and takes payments such as small crying babies, fully grown bulldogs, flamingos and other wierd things. the giant slug runs its own money laundry place and cover it up with a drycleaner(right word?). kakashi's nin-dogs are the local street gang calling themselfs "the dogs"