The Taisei Yokusankai (大政翼贊會/大政翼賛会^?, "Imperial Rule Assistance Association" or "Imperial Aid Association") was Japan's para-fascist organization created by Prime Minister Fumimaro Konoe on October 12, 1940 to promote the goals of his Shintaisei ("New Order") movement. It evolved into a "statist" ruling political party which aimed at removing the sectionalism in the politics and economics in the Empire of Japan to create a totalitarian single-party state, in order to maximize efficiency of Japan’s total war effort in China. When the organization was launched officially, Konoe was hailed as a "political savior" of a nation in chaos; however, internal divisions soon appeared.

Based on recommendations by the Shōwa Kenkyūkai, Konoe originally conceived of the Imperial Rule Assistance Association as a reformist political party to overcome the deep-rooted differences and political cliques between bureaucrats, politicians and the military. During the summer of 1937, Konoe appointed 37 members chosen from a broad political spectrum to a preparatory committee which met in Karuizawa, Nagano. The committee included Konoe's political colleagues Fumio Gotō, Count Yoriyasu Arima and ex-syndicalist and right wing spokesman Fusanosuke Kuhara. The socialist and populist left wing was represented by Kingoro Hashimoto and the traditionalist military wings by Senjūrō Hayashi, Heisuke Yanagawa and Nobuyuki Abe.