Ansei 3 (1856) year, Edo Shogunate's order (object particle) received Nanbu Domain (subject particle), Ezochi security's for Nanbu Muroran Jinya's Oshamanbe branch garrison as established thing.

Now also at that time's moat and earthwork's traces (subject particle) remain, neighboring region's only early modern historical site as, 1974 year in (topic particle) nation's cultural property also (to) was designated.