In Japan, it is possible to adopt an adult.
Japanese people do a lot of things for the sake of their families and for extending their family name, so it is possible to adopt an adult in this country. There are even cases of adopting a daughter’s husband or vice versa: the daughter’s husband can adopt her parents. In this way, they distribute an inheritance to a larger number of people and pay lower taxes.
"Japanese people traditionally make snowmen with 2 snowballs, not 3 like the rest of the world."
specially in AFRICA !