Yamashiro Province (山城国, Yamashiro no Kuni) was a province of Japan, located in Kinai. It overlaps the southern part of modern Kyoto Prefecture on Honshū. Aliases include Jōshū (城州?), the rare Sanshū (山州?), and Yōshū (雍州?). It is classified as an upper province in the Engishiki.
Yamashiro Province included Kyoto itself, as in 794 AD Yamashiro became the seat of the imperial court, and, during the Muromachi Period, was the seat of the Ashikaga Shogunate as well. The capital remained in Yamashiro until its de facto move to Tokyo in the 1870s.(Wikipedia)