The H-II Transfer Vehicle KOUNOTORI 4 (HTV4) is the fourth mission of the H-II Transfer Vehicle series, developed by the Japan Aerospace Exploration Agency (JAXA). The KOUNOTORI missions, meaning "white stork" in Japanese, are designed to deliver essential supplies to the International Space Station (ISS). HTV4 carried several Cubesats, small satellites designed for scientific research and technology demonstrations, which were deployed from the ISS.