It is a nawabari (castle plan; general term for the layout of a castle and its component structures) castle tower complex, which consists of a 5-tiered, 6-story multi-level tower-type large keep, a 3-tiered, 4-story Inui-kotenshu small keep, a 2-tiered Tatsumitsuke-yagura turret, and a Tsukimi-yagura turret, being the castle tower of the only Hirajiro (a castle built on flatland) among the ’12 existing castle towers.’
層塔型5重6階の大天守と3重4階の乾小天守、2重の辰巳附櫓と月見櫓を付属させた天守縄張りの天守で、「現存12天守」の中では唯一の平城の天守である。