Kenichi Matsuoka (松岡 健一, Matsuoka Ken'ichi, born June 7, 1982) is a professional Japanese baseball player and coach. He pitched for the Tokyo Yakult Swallows from 2005 through 2018, and has been a pitching coach for the Swallows since the 2019 season. Matsuoka played the one season with the Waikiki BeachBoys of the now defunct Hawaii Winter Baseball league, a MLB off-season developmental league that sought to develop Japanese players much like the Arizona Fall League. Matsuoka was picked up by the Swallows in 2005 as a pre-round draft pick from Kyushu Tokai University.