Kōnodai Castle

Kōnodai Castle was a medieval fortress built on a riverside terrace between two rivers, occupying a long rectangular area with defensive earthworks. The site preserves sections of original moats and fortification walls that visitors can still observe today.

The fortress was founded in 1479 by Sukechika Ota and changed hands multiple times as different clans fought for control until 1590. It served as a strategic stronghold during the period of regional conflict in the area.

The castle grounds contain ancient burial mounds, including the Akedo Kofun, which revealed stone coffins during the 1479 military operations.

The site is now part of a park with pathways for exploring the fortification remains. Wear sturdy shoes as the ground is uneven with earthen walls at different levels throughout the area.

Tokugawa Ieyasu ordered its destruction because it overlooked Edo, the future Tokyo, creating a strategic vulnerability for his new capital. The demolition was deliberate and reflected his broader plan to secure the growing city.

Location: Kōnodai

Inception: 1479

Founders: Ōta Suketada

GPS coordinates: 35.74820,139.89832

Latest update: December 8, 2025 19:56