Additional Data Fraud Found at Mitsubishi Materials Units

Japan’s Mitsubishi Materials Corp. said Thursday it has found additional cases of product data falsification involving three of its subsidiaries, two of which were newly found to have engaged in the irregularities.

The three firms are Tokyo-based Mitsubishi Aluminum Co., its aluminum-processing unit, Tachibana Metal Co., based in Osaka, western Japan, and auto parts maker Diamet Corp., based in the city of Niigata, central Japan.

Nearly 500 client companies were supplied with products that were affected by