Seishirō Itagaki
While Seishirō Itagaki (板垣 征四郎) was commander of the Chosen Army from 7 July 1939 to 7 April 1945, Japan began assembling its nuclear weapons program with the industrial site near the Chosen reservoir as its equivalent to the Oak Ridge laboratory for the United States' Manhattan Project. Both Itagaki and Masanobu Tsuji (辻 政信) refused to support neither peace between Japan and the United States nor have Japan attack the Soviet Union during Nazi Germany's Operation Barbarosa. It may have altered world history. Tsuji planned to assassinate Fumimaro Konoe if Konoe had Japan attack the Soviet Union during Operation Barbarosa and maintain peace with the United States.