First Battle of Kōnodai - Sengoku Shogun Map
Follow the 1538 First Battle of Kōnodai phase by phase on the map, with the commanders involved and the sources behind each step.
October 1538 国府台
The Bōsō forces of Ashikaga Yoshiaki, Satomi Yoshitaka, and their allies fought Hōjō Ujitsuna's army at Kōnodai. The Hōjō won and Yoshiaki was killed.
Major events
- October 1538: First Battle of Kōnodai — The forces of Hojo Ujitsuna and his heir Ujiyasu fought the Boso army of Ashikaga Yoshiaki of the Oyumi kubo and Satomi Yoshitaka at Konodai; the Hojo won and Yoshiaki was killed.
背景
For the Hojo, who had secured Izu and Sagami, Musashi was the door to the Kanto plain, Edo Bay and the river routes. Ujitsuna took Edo Castle in 1524 and Kawagoe Castle in 1537, breaking up Uesugi strongholds and extending his forces and administration into northern Musashi and Shimosa. The confrontation at Konodai with Ashikaga Yoshiaki of the Oyumi kubo and Satomi Yoshitaka came as that advance reached Boso and Shimosa.
結末
The Hojo won and Ashikaga Yoshiaki of the Oyumi kubo was killed. Ujitsuna's domain is held to have spread beyond Izu and Sagami into Musashi, part of Suruga and part of Shimosa.
歴史的な位置づけ
The victory displayed Hojo military power to the powers of Boso and Shimosa. Ujitsuna widened the basis of a network of branch castles with their own keepers: Kawagoe later fell to the Daidoji, Tamanawa to Hojo Tsunashige, and the Hachioji area to Hojo Ujiteru. Since keepers and dates changed by generation, Ujitsuna cannot be said to have completed the later arrangement of branch castles.
Commanders
- 北条氏綱 （後北条氏・Hojo commander-in-chief） — Fought and defeated the Boso army in the course of his advance into Musashi and Shimosa.
- 足利義明 （小弓公方・The Oyumi kubo） — Formed the Boso army with Satomi Yoshitaka and others and was killed in the battle.
- 里見義堯 （里見氏・A leading power of Boso） — Fought the Hojo alongside Ashikaga Yoshiaki.
- 北条氏康 （後北条氏・Ujitsuna's heir） — Fought at Konodai alongside his father and succeeded to the headship in 1541.