Home2023 Treaties and Agreements ...Japan (23-411) – Agreement for Cooperation for the Martian Moons eXploration Mission hide Japan (23-411) – Agreement for Cooperation for the Martian Moons eXploration Mission TIAS Office of Treaty Affairs April 11, 2023 Space: Martian Moons Exploration Exchange of notes at Tokyo April 11, 2023; entered into force April 11, 2023. Download Agreement [1 MB] Tags Japan Space Treaties