Junichi Usui (臼井 淳一, Usui Jun'ichi) (born 5 October 1957) is a retired Japanese long jumper, best known for finishing seventh at the 1984 Olympic Games. Usui won the British AAA Championships title in the long jump event at the 1982 AAA Championships.
Source: “Junichi Usui”, English Wikipedia (CC BY-SA 4.0), excerpt