The subject of investigation is the case of the Japanese and Peruvians of Japanese origin, mistreated in the decade of 1940 due to the World War II. It takes place in the historical con[T1939]-1945, as a study of the Japanese community in Peru in the face of the international conjuncture of the world conflict and the social consequences in our country, especially the deportation of Peruvians of Japanese origin to the United States. The general objective of the investigation is therefore to explain the situation of the Japanese and Peruvian of Japanese origin in our country during said world conflict. Its specific objectives are to describe the social and political context of Lima immediately before and during World War II, to explain the characteristics of the Japanese community in Peru and Lima in the period 1939-1945, and to analyze the main social and ethnic consequence of World War II in these social group. Finely reached three conclusions: the Japanese began to arrive in Peru in 1899 in two stages, until 1923 by means of labor recruitment companies, and from 1924 to 1936 by family calls, stage that stopped by the low level salary, and because finally the import of labor was no longer necessary; The Japanese responded to the racist oligarchic environment with its capacity for social mobility, emerging, alongside the Japanese Nikei, their Isei children, their Nisei grandchildren, and the Sansei of Peruvian nationality. The main consequence in the Japanese community was, however, the mistreatment due to the conjuncture of the world war: looting, xenophobia, anonymous flyers, and deportation between 1941 and 1945 through blacklists of Japanese and of Japanese of Japanese origin