Ogaki Castle is a historical site that served a valuable role during the Battle of Sekigahara, with Mitsunari Ishida of the western army using it as his home base. Designated as a national treasure in 1936, it was then lost to the fires of war in July of 1945. Following the reconstruction of this four-storey castle in April of 1959, it quickly became recognized as the symbol of Ogaki. On display within the castle are many exhibits related to the Battle of Sekigahara and Ogaki Castle, as well as exhibits that showcase the culture and lifestyles of warriors and peasants from that period.