Ashikaga Tadayoshi(足利 直義, 1306 - March 13, 1352, Kamakura, Japan) was a general of the Northern and Southern Courts period (1337–92) of Japanese history and a close associate of his elder brother Takauji, the first Muromachi shogun. Son of Ashikaga Sadauji and of a daughter of Uesugi Yorishige, the same mother as Takauji, he was a pivotal figure of the chaotic transition period between the Kamakura and Muromachi shogunates. Tadayoshi is today considered a military and administrative genius and the true architect of many of his elder brother's successes. In contemporary chronicles he is rarely called with his name, but is instead called either gosho(御所,shogun) or Daikyū-ji-dono(大休寺殿) from the name of his family temple. His posthumous name was Kozan Keigen(古山慧源).