A series of Japanese traditional townhouses in Kurashiki, which is called "Yashiki Type Townhouse" is analyzed with respect to the following 3 aspects. 1. Relationships between a series of General Townhouses and Yashiki Type Townhouses are analyzed. The similarities between these two series of townhouses are described with respect to their facade size and their ground floor planning. The prototype of the Yashiki Type Townhouse are defined through this analysis. 2. By tracing the construction history of several Yashiki Type Townhouses over age, the way of development of prototype of Yashiki Type Townhouses are analyzed. 3. The decision of locating the prototype, garden and other boundary structures for Yashiki Type Townhouses within property lines are analyzed. The process of deciding a location is correlated with townscape elements such as mountain and canals.