Kosuke Kitajima (北島 康介, Kitajima Kōsuke, born September 22, 1982) is a Japanese retired breaststroke swimmer. He won gold medals at the men's 100 m and 200 m breaststroke events at the 2004 Summer Olympics, and the 2008 Summer Olympics – becoming the first and only swimmer to sweep the breaststroke events at consecutive Olympic games.[2]