Hirokazu Ninomiya (二宮 洋一, Ninomiya Hirokazu, 22 November 1917 – 7 March 2000) was a Japanese football player and manager.

Ninomiya was born in Hyogo Prefecture on 22 November 1917.

On 16 June 1940, when Ninomiya was a Keio University student, he debuted for Japan national team against Philippines and Japan won the match.

After World War II, Japan national team was resumed activities in 1951.

On 7 March 2000, Ninomiya died of pneumonia in Tokyo at the age of 82.