Koichi Oita (種田 孝一, Oita Koichi, April 9, 1914 – September 11, 1996) was a Japanese football player and manager. He played for Japan national team.

Oita was born in Tokyo on April 9, 1914. In 1936, when he was a Tokyo Imperial University student, he was selected Japan national team for 1936 Summer Olympics in Berlin.^[1] At this competition, on August 4, he debuted against Sweden. Although he was a midfielder, he played as a defender. Japan completed a come-from-behind victory against Sweden. The first victory in Olympics for the Japan and the historic victory over one of the powerhouses became later known as "Miracle of Berlin" (ベルリンの奇跡) in Japan. In 2016, this team was selected Japan Football Hall of Fame. On August 7, he also played against Italy. He played 2 games for Japan in 1936.^[2]

After retirement, in 1947, Oita became a manager for new club Sumitomo Metal and managed until 1956.

September 11, 1996, Oita died of heart failure in Bunkyo, Tokyo at the age of 82.

^[2]

• Koichi Oita – FIFA competition record (archived)
• Koichi Oita at National-Football-Teams.com
• Japan National Football Team Database
• Japan Football Hall of Fame (Japan team at 1936 Olympics) at Japan Football Association
• Evans, Hilary; Gjerde, Arild; Heijmans, Jeroen; Mallon, Bill; et al. "Koichi Oita". Olympics at Sports-Reference.com. Sports Reference LLC. Archived from the original on 2020-04-17.