A Japanese president of Peru isn't actually that odd. In the late 19th and early 20th centuries, it was thought the answer to overpopulation was to shift it to more sparsely populated areas. This is the underlying idea of the '10 pound poms' sent to Australia; Milner's settlement programme in South Africa, Rhodesia and Kenya; Welsh in Patagonia; the Italian Fourth Shore or French Algeria; or the Nazi's Lebensraum.
Japan did the same. They shipped excess population to Saipan, Hawaii, Peru and Brazil. There are large areas around Belem in Brazil and in Peru, where literally everyone is of Japanese descent - usually mixed by today though.