Although the Watari-yagura (connecting corridor) turret was lost, it is a 2-tiered, 2-story tower-type keep directly connected to a smaller keep or turret, being the smallest (11 meters tall) of the existing castle towers.
渡櫓は失ってはいるが、複合式層塔型2重2階の天守で、現存天守の中では最も規模が小さい（高さ約11メートル）。