I analyzed the developing process of the house plan and the townscape of Otai post town in the "Shukuezu"; old maps in the Edo era. As a result, from the middle toward the end of Edo era, some of the post town buildings had developed a more functional approach, which could be seen in the highly sophisticated living spaces and guest spaces. However, a similar house plan to the typical peasant's house was still seen in many of the buildings of post town of the end of Edo era. In addition, each Kamimachi, Nakamachi and Simomachi had different views of the outside.
