INTERACTIVE BATTLE
First Battle of Kōnodai
October 1538 · Kōnodai
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.
Background
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.
Outcome
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.
Course of the battle
Historical significance
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.
Key figures
後北条氏
2
小弓公方
1
The Oyumi kubo
Formed the Boso army with Satomi Yoshitaka and others and was killed in the battle.
Sources3·Certainty: High
里見氏
1
Notes on the data
Later war tales and local tradition give large numbers and heroic episodes for the troop counts and individual feats. This page keeps to the capture of castles, the outcome of the fighting and the change in spheres of power, and does not adopt figures or stratagems until they can be confirmed in primary sources.
Sources consulted
- 市川市「里見公園」
- 市川市「国府台・堀之内界隈」
- 江戸川区郷土資料室「国府台の合戦」
- 小田原デジタルミュージアム「北条氏綱」
The numbers in the text refer to the list above. Certainty indicates how far a statement is supported by the cited sources; it does not refer to the precision of the coordinates or the dating.
Advertisement