Hatakeyama

The Hatakeyama began as a Taira house of Musashi Province, named for its Hatakeyama estate, but Hatakeyama Shigetada's line was destroyed in the Hojo purge of 1205. Hojo Tokimasa then had Ashikaga Yoshizumi of the Seiwa Genji marry the widow and revive the name, so the later Hatakeyama were Minamoto.

They fought for the Ashikaga shogunate through the Nanboku-cho wars and won hereditary constableships in Yamashiro, Noto and other provinces, becoming one of the three kanrei houses of the Muromachi regime. Around 1450 Masanaga and Yoshinari disputed the succession; the feud helped spark the Onin War of 1467 and cost the clan the kanrei office to the Hosokawa.

In the Sengoku age the branches parted. The Kawachi line remained a leading opponent of Oda Nobunaga, the Noto line at Nanao Castle fell to internal strife in the 1570s, and the Nihonmatsu line in Mutsu, reduced to Ashina vassals, was largely destroyed by Date Masamune after Hitotoribashi in 1586.