| Yasuhiro NISHIGAYA regards the origins of the structure symbolic of a castle to be such temporary high-rise buildings as lookouts found in the Yoshinogari site and so on and watch towers and so on in the Sengoku period. |
西ヶ谷恭弘は、吉野ヶ里遺跡などにあった楼観や戦国時代の井楼等の仮設の高層建築に城郭の象徴となる建物の起源を求めている。 |