According to the "An Investigation of Global Policy with the Yamato Race as Nucleus", a classified report in 1943 of the Ministry of Health and Welfare completed on July 1, 1943, just as a family has harmony and reciprocity, but with a clear-cut hierarchy, the Japanese, as a racially superior people, were destined to rule Asia "eternally" as the head of the family of Asian nations. The most horrific xenophobia of the pre-Shōwa period was displayed after the 1923 Great Kantō earthquake, where in the confusion after a massive earthquake, Koreans were wrongly maligned as poisoning the water supply. A vicious pogrom resulted in the deaths of at least 3,000 Koreans, and the imprisonment of 26,000.