Uji is a city on the southern outskirts of the city of Kyoto, in Kyoto Prefecture, Japan. Founded on March 1, 1951, Uji is between the two ancient capitals of Nara and Kyoto. The city sits on the Uji River, which has its source in Lake Biwa. As of 1 October 2020 Uji has a population of 179,630 and is the second largest city in Kyoto Prefecture. It has an area of 67.54 km2, giving it a population density of 2,660 persons per km2.