However, in the Sengoku period (period of warring states) (Japan), when authority was unified by the influential daimyo (Japanese territorial lord), samurai who had lived in their own town were obliged to live in a group in a castle town established by their lord, with the result that Horinouchi and Doi were gradually extinguished.
しかし、戦国大名による権力の一元化が進んだ戦国時代(日本)になると在地の武士たちは城下町へ集住させられるようになり、堀之内・土居は次第に消滅していった。