The remains are located on a plain on the western shore of the Iruma-gawa River to the north-west of the urban area of the current Kawagoe City, sandwiching the Joraku-ji Temple to the south-east and covering an area approximately 150 meters east to west and 200 meters north to south, with a mound about one to three meters high, and part of the moat remains on the outside, with the total area covering approximately 240 meters east to west and 300 meters north to south.
遺跡は、現在の川越市市街地の北西、入間川西岸に接する平地にあり、その南東部を占める常楽寺境内をはさんで、東西約150メートル、南北約200メートルの方形の区画（曲輪）を思わせる高さ1メートルないし3メートルの土塁およびその外側の堀が一部遺存しており、全体では東西約240メートル、南北約300メートルの規模を有する。