ARIBAYASHI Koji

Director, Atomic Energy Division, Ministry of Education, Culture, Sports, Science and Technology (MEXT)

Mar.	2001	Graduated from Tokyo Institute of Technology (Master’s: Nuclear Engineering)
Apr.	2001	Atomic Energy Division, MEXT
Apr.	2003	Unit Chief, Office of Emergency Planning and Environmental Radioactivity, MEXT
Aug.	2004	Unit Chief, Office for Evaluation, MEXT
Apr.	2006	Deputy Director, Life Science Division, MEXT
May.	2008	Deputy Director, Atomic Energy Division, MEXT
Apr.	2010	Deputy Director, Space Development and Utilization Division, MEXT
Apr.	2011	Deputy Director, Economic Damage Response Office for Nuclear Power Plant Accidents, Cabinet Secretariat
Jun.	2012	First Secretary, Permanent Mission of Japan to the ASEAN, MOFA
Jul.	2015	Deputy Director, Development Planning Division of Research and Development Bureau, MEXT
Apr.	2016	Director, Office for Corporate Strategy, National Institute for Materials Science
Aug.	2017	Secretary to Minister, MEXT
Oct.	2018	Director for Space Development and Cooperation, Space Development and Utilization Division, MEXT
Jan.	2019	Director, Office for Radioactive Waste Management Policy, MEXT
Jul.	2021	Counselor, Embassy of Japan in the U.S (Chief of Science Section)
Jul.	2024	Director, Atomic Energy Division, MEXT

Koji Aribayashi is the Director of the Atomic Energy Division at the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), a post he assumed in July 2024.

Prior to his current position, he was the Science Counselor at the Embassy of Japan in the United States of America from 2021 to 2024.

Mr. Aribayashi joined MEXT in 2001 where he worked to promote R&D in the areas of Nuclear Energy, Fusion Energy, Space, Life Sciences and Materials Science, among others. He graduated from the Tokyo Institute of Technology with an MA in Nuclear Engineering in 2001.