Aircraft Accident Investigation Commission
（重定向自AAIC）
The Aircraft Accidents Investigation Commission (AAIC, 航空事故調査委員会 Kōkūjiko chōsa iinkai) was a government agency of Japan which investigated aviation accidents and incidents. It was subordinate to the Ministry of Transport.
It was founded in 1974, following the All Nippon Airways Flight 58 Shizukuishi aircraft accident on July 30, 1971 and the Toa Domestic Airlines Flight 64 accident. On 1 October 2001 the agency was replaced by the Aircraft and Railway Accidents Investigation Commission (ARAIC). After a train accident occurred on the Tokyo Metro Hibiya Line on March 8, 2000 the former AAIC was restructured to ARAIC to also deal with railway accidents.