Hachigata Castle

Hachigata Castle in Yorii, Saitama Prefecture, crowns a cliff where the Ara River curves dramatically — a distinctive hill-plain castle ranking among Kantō's finest. The castle exploits the Ara River's natural advantages on three sides, while the southern approach is defended by massive earthen ramparts and dry moats. It served as the northernmost front-line fortress in the Later Hōjō's Kantō domain.

The castle was founded by Nagao Kageharu in 1476 (8th year of Bunmei), but achieved its greatest prominence under Hōjō Ujikuni, the fourth-generation Later Hōjō lord, who reorganized and expanded Hachigata Castle as the administrative center of northwest Kantō and developed its castle town. The castle preserves structures such as the Hemi enclosure, reflecting the distinctive fortification techniques of the Hōjō school — occupying an important place in the study of Sengoku-period Kantō castles.

During the 1590 Odawara Campaign (18th year of Tenshō) launched by Toyotomi Hideyoshi, Hachigata Castle endured an approximately one-month siege by the combined forces of Maeda Toshiie and Uesugi Kagekatsu (estimated 35,000 troops). With a garrison of roughly 3,000, this siege stands as historical testament to the Later Hōjō's formidable defensive strength. The castle ultimately surrendered peacefully through negotiation, and Ujikuni retired to Kōyasan.

Today, Hachigata Castle is preserved as the Hachigata Castle History Museum and castle-site park, with its extensive grounds designated as a nationally protected historic site. The Hachigata Castle ruins, where the majestic Ara River valley and Sengoku-period remains coexist, remain a popular destination among Kantō castle enthusiasts.