Also, there were not only Yagura but also a Tenshu substitute such as 'Odashishoin' of Kubota-jo Castle, which was a Goten (palace) constructed on Honmaru foundation.
また、櫓に限らず、久保田城の「御出書院」のように御殿を本丸塁上に建てて天守の代用としていた例もある。