This paper aims to clarify the change of the city's organization through the city's formation of the feudalistic castle and castle town. In 1645 Asano Naganao became the ruler of Ako Clan, and he repaired the castle and castle town. This paper clarifies the method and process of the repair of the castle and the castle town's content after the repair. As a result, Ako castle and castle town was renovated in accord with the social position of Daimyo, the site for Samurai town. civilian town and temple town. The renovation continued longer than the registered period. After the renovation. the house's distinction of Samurai according to the social position became not clear by expanding its area. In general, Samurai's social position is reflected in the area of the house, but it is not strict for middle and low class in the era of Ikeda and Asano.
