Transport authorities have inspected Mitsubishi Motors Corp.'s head office in Tokyo and some of its dealers on suspicion it concealed documents regarding complaints from users at the time of a regular inspection, Transport Ministry officials said Tuesday.
The authorities carried out the special inspection early this month, after receiving an anonymous phone call in June claiming Mitsubishi Motors had not submitted some documents at the time of a regular inspection in November.
The ministry inspects all automakers once a year to check whether complaints are being addressed properly.