was an Olympic boxing bronze medalist from Osaka, Japan.
Morioka won the inter-high school boxing tournament in his senior year, and entered Kinki University. He won the Japanese amateur boxing tournament four years in a row from 1965 to 1968. He was chosen as a member of the Japanese Olympic team for the 1968 Summer Olympics, and won a bronze medal in the bantamweight division.
He made his professional debut after graduating, but retired after it was discovered that he had suffered a detached retina. His professional record was 6-4-0 (3KOs).
After retiring, he served as the commissioner of the Western Japan Boxing Commission from 1998 to 2000. He also founded a boxing gym in Kawanishi, Hyogo. He died from cancer in 2004, at 58 years of age.
His nephew, Toshiyuki Morioka, has created a movie based on his life, which was released in Japan in January 2008.