Koshikishima Quasi-National Park is a Quasi-National Park in the Koshikijima Islands of Satsumasendai, Kagoshima Prefecture, Japan. It was founded in 2015 and has a land area of 54.47 km2 alongside protected surrounding waters of 252.88 km2. It subsumes the former Koshikijima Prefectural Natural Park, founded in 1981 with a land area of 24.59 km2.