Ono (小野市 Ono-shi) is a city located in Hyōgo Prefecture, Japan. The city was founded on December 1, 1954. As of 30 April 2011, the city had an estimated population of 50,522, with 18,724 households and a population density of 539.30 persons per km². The total area is 93.68 square kilometres (36.17 sq mi). Ono is one of the largest producers of abacus (Soroban in Japanese). An official report puts the value of shipments at 1.25 million US dollars per year.