Yufu is a city in Ōita Prefecture, Japan. The modern city of Yufu was established on October 1, 2005, from the merger of the towns of Hasama, Shōnai and Yufuin (all from Ōita District). As of 1 October 2007, the city has an estimated population of 35,338, and a population density of 111 persons per km². The total area is 319.16 km². Geography Yufu is located in central Ōita Prefecture, surrounded by mountains, such as Yufudake (1,583 m), Shirogatake, and Tokiyama. The Ōita River created an alluvial fan, where farming is done. Part of the city is named as a portion of Aso Kujū National Park. Also, Yufu is known for its many hot springs.