Percy Sekine (born 20 February 1920 in London, died on 15 October 2010) was a distinguished sensei of the Hammersmith, London based Judokan. He represented Great Britain in international judo tournaments four times in the 1940s and 1950s, and was never beaten. He was also a coach of the British national judo team. His wife Hana was the daughter of Gunji Koizumi.