The purpose of this study is to clarify the spatial structures of the Niida-okura-syo that the Syonai Domain constructed in the Sakata Port which is the Mogami River estuary in the late Edo period. The operation policies of the Niida-okura-syo were the same as the operation policies of the Gozyomai-okurasyo which owned by the shogunate; however, the Niida-okura-syo had characteristics such as the small blocking of a building arrangement, the diversification of Okura’s types, and the changes in spatial structures. It was guessed that the cause was cooperation between Kumi and Kumi which is a union of villages.
