Hiromichi Umebayashi is the President of the Peace Depot, Yokohama, Japan. He is the International Coordinator of the Pacific Campaign for Disarmament and Security (PCDS) and an Editor-in-Chief, Nuclear Weapon and Nuclear Test Monitor. He is also a member of the International Steering Committee of the Middle Powers Initiative (MPI) and the East Asian Coordinator, Parliamentarian Network for Nuclear Disarmament (PNND).