Japan Marine Accident Inquiry Agency (海難審判庁 Kainan Shinpanchō , JMAIA) was a body of the Japanese government that investigated accidents regarding boats and other marine equipment.
It was housed in the 2nd Building of the Central Common Government Office at 2-1-2 Kasumigasaeki in Chiyoda, Tokyo.[1][2] On October 1, 2008 the Aircraft and Railway Accidents Investigation Commission (ARAIC) and the JMAIA merged, producing the Japan Transport Safety Board.[2]