Fuji is a city in eastern Shizuoka Prefecture, Japan. As of 1 December 2019, the city had an estimated population of 245,015 in 106,087 hou…Fuji is a city in eastern Shizuoka Prefecture, Japan. As of 1 December 2019, the city had an estimated population of 245,015 in 106,087 households, and a population density of 1,000 people per km². The total area of the city is 244.95 square kilometers. Fuji is the third largest city in terms of population in Shizuoka Prefecture, trailing Hamamatsu and Shizuoka.