Mitsubishi Materials Corp. said Thursday that three of its subsidiaries have falsified specification data for products supplied to the aerospace, automotive and electric power industries.

The revelation comes on the heels of quality control scandals at other major Japanese firms, including a metal product data falsification scandal at Kobe Steel Ltd.

Rubber products produced by one of the subsidiaries were used by the Self-Defense Forces in some of the engines of their aircraft and vessels despite not meeting specification requirements, according to officials at a government agency responsible for development and procurement of defense equipment.