Hosokawa Clan - Muromachi and Sengoku Eras

Muromachi and Sengoku Eras

Ashikaga Yoshisue, son of Ashikaga Yoshizane, was the first to take the name of Hosokawa. Hosokawa Yoriharu, a Hosokawa of the late Kamakura period, fought for the Ashikaga clan against the Kamakura shogunate. Another, Hosokawa Akiuji, helped establish the Ashikaga shogunate.

The clan wielded significant power over the course of the Muromachi (1336–1467), Sengoku (1467–1600), and Edo periods, moving, however, from Shikoku, to Kinai, and then to Kyūshū over the centuries.

The clan was also one of three families to dominate the post of Kanrei (Shogun's deputy), under the Ashikaga shogunate. One such individual was Hosokawa Yoriyuki. At the beginning of the Ashikaga's rule, the Hosokawa were given control of the entirety of Shikoku. Over the course of this period, members of the Hosokawa clan were Constables (shugo) of Awa, Awaji, Bitchu, Izumi, Sanuki, Settsu, Tamba, Tosa, and Yamashiro Provinces.

A conflict between Hosokawa Katsumoto, the fifth Kanrei, and his father-in-law Yamana Sōzen, over the shogunate's succession, sparked the Ōnin War, which led to the fall of the shogunate and a period of 150 years of chaos and war, known as Sengoku. Following the fall of the Ashikaga shogunate, which was based in Kyoto, control of the city, and thus obstensibly the country, fell into the hands of the Hosokawa clan (who held the post of Kyoto Kanrei - Shogun's deputy in Kyoto) for a few generations.

Katsumoto's son, Hosokawa Masamoto, held power in this way at the end of the 15th century, but was assassinated in 1507. After his death, the clan became divided and was weakened by internecine fighting. What power they still had, however, was centered in and around Kyoto. This gave them the leverage to consolidate their power to some extent, and came to be strong rivals with the Ōuchi family, both politically, and in terms of dominating trade with China. The Hosokawa remained in Kyoto for roughly one hundred years, fleeing the city when it was attacked by Oda Nobunaga.