A Self-Defence Force training aircraft crashed after taking off from a military base in central Japan, Chief Cabinet Secretary Yoshimasa Hayashi said on Wednesday, declining to elaborate further.
A defence ministry spokesperson said it is collecting information.
Japanese public broadcaster NHK, citing multiple defence ministry officials, reported that the T-4 training aircraft disappeared from radar while flying near Inuyama city in Aichi prefecture.
A representative from the Inuyama city fire department told Reuters that the aircraft likely carried two people on board.
The local fire department received a call reporting that something resembling an aircraft had crashed into a pond in Inuyama shortly after 3 p.m. (0600 GMT), according to NHK.
