Abstract
Many of Japanese castle towns include unique landscapes that show further mountain peaks along the extended centerline of streets. Besides, even if this phenomenon has long been generally recognized as usual landscapes, it was not scientifically proved as a design method of urban landscape yet. Based on this consideration, this paper aimed at investigating the geographical locations among each street centerline and mountain peak using GIS in Tsuruoka City. As a result, it was revealed that angles between extended 18 street center lines and lines toward mountain peaks were measured up to 2.7 degree, and these numeric outcomes can be certain indices of verifying the presence of urban landscape design method of castle town.