The restored Tenshu (donjon or keep) is of Boro type (with the top tower keep placed on the main structure) of the era of Nobunaga with a Dai-tenshu (large keep of three roofs and four stories), Tsuzuki-yagura (linking turrets), and connected Sho-tenshu (small keep).
復元天守は、大天守（3層4階）、続櫓、小天守が連結された形で、近世初期の望楼型である。