Toyotomi Hidetsugu
However, the political power of the Ashikaga shogunate did not last long, and from the middle of the Muromachi period onward, all the shogun's deputies, with the exception of the Hosokawa clan, declined. The Ashikaga shogunate became more like a coalition government of powerful constables than a shogunate control, which led to factional struggles and frequent wars such as the Ōnin War. In addition, as the transition from constables to sengoku magnates and the tendency for deputy constables and samurais in each region to conquer each other spread, they became desperate to survive. Onmyōdō, which had been used formally as a complement, became less important. A succession of wars and the tyranny of the sengoku magnates led to the destruction of Heian-kyō, the seat of the Imperial court that had been the protector of the onmyōdō, and the shoguns of the Muromachi shogunate, which was located in the capital, often fled. In the first half of the 16th century, Tsuchimikado Arinobu evacuated his territory, which he had never visited in peacetime, to Notaoi, Natashō, Wakasa Province. Three generations of the Tsuchimikado family, Tsuchimikado Arinobu, his son , and his grandson , were appointed as the Head of Onmyō. However, they rarely served in Heian-kyō and remained in Wakasa Province to perform various rituals, including the festival of the Great Emperor of the Sacred Mountain of the East. As a result, the Imperial court was baffled and had no choice but to summon , a member of the Kadenokōji clan, to report on various matters. In this way, the operation of the Bureau of Onmyō became extremely unnatural. Later, as the Toyotomi clan established its power through the Oda clan, Toyotomi Hideyoshi, the , ostracized his adopted son, Toyotomi Hidetsugu, and had him disemboweled. , son of Tsuchimikado Arinaga, was blamed for undertaking a prayer service for Toyotomi Hidetsugu and was exiled to Owari Province. Furthermore, Toyotomi Hideyoshi suppressed a large number of onmyōji. Therefore, the position of the Head of Onmyō and below became practically vacant, and onmyōji did not operate in the center of the Toyotomi administration. The onmyōdō that had existed since the Heian period completely lost its reality.