‘Udatsu’is a wall structure made from plaster that was built on the second floor, sticking out from the house, in the densely settled residential areas during the Edo period (1603-1967). Because the construction costs are high, these became a symbol of prosperity and wealth, and gave birth to the phrase ‘udatsu ga tatsu’, which means that a family was successful enough to build on of these plaster awning structures. Wakimachi was an indigo dyeing center and home to many wealthy merchants, and rows of fine houses with classic tile roofs and storehouses have been preserved. To protect the architectural character, the national government has designated this district as an important preservation district for groups of historic buildings.