Koichi Ono (小野 光一, Ono Kōichi, 19 May 1919 – 6 November 2000), born Son Shi-Kin in Dalian, Manchuria (now China), was a Japanese professional golfer. He was one of the leading golfers on the Japanese circuit during the 1950s, winning the Japan Open Golf Championship three times and representing Japan on four occasions in the Canada Cup. He was inducted into the Japan Professional Golf Hall of Fame in 2012.