The Atomic Energy Commission of Japan (原子力委員会, Genshiryokuiinkai) was established in 1956 and serves as the regulatory body for nuclear power in Japan. The Atomic Energy Basic Law contained a provision for its creation, and shortly after the law was enacted, the organization started activities, which are stated to be: assure that research and use of nuclear power is conducted safely and with peaceful intentions, and construct plans for the use and development of nuclear power. It is now structured with 3 different committee members as commission of inquiry to the Cabinet Office.

The AEC is located in Kasumigaseki, Chiyoda, Tokyo.