In the past, there was a view that Tenshu with Shikkui-Okabe (Plaster wall) were more in a newer style than Tenshu with Shitamiita-bari; however, recently there is an opinion that they are equal with each other.
従来は下見板張の天守よりも塗籠大壁の天守が新式であるという説があったが、近年では優劣に差はないという見方がある。