The Chofu Mori Clan announced "Tatsu Toyoura Kachu Ittoka protocol" in Tenpo era to set the limit for building a new house by the social position of the Clansman.

The unique point about this castle town Chofu is the structure of houses facing the street with elements of the gate, terrace houses, mud walls, stone walls and the gardening style inside them. As the structure,, the stone walls were built above the site first. The mud walls were built additionally on top of them. Usually, these walls are only kept bare without covered by mortar.