Sadao Bekku (別宮貞雄 Bekku Sadao, May 24, 1922, Tokyo – January 12, 2012, Mitaka, Tokyo), was a Japanese classical composer. His works include five symphonies, film scores, a flute sonata, a piano concerto, choral work and art songs, and the opera, Prince Arima. His work took strong influence from jazz. His most famous works include the film score, Matango (1963).