SUMCO on the Tohoku–Pacific Ocean earthquake

JAPAN: SUMCO Corp. expresses its deepest condolences to all victims of the Tohoku–Pacific Ocean earthquake that occurred on March 11, 2011.

Please be informed of the impact of this earthquake on the operations of SUMCO.

Following the earthquake, the operations of the Yonezawa Plant (Yonezawa, Yamagata) have been suspended. None of the workers at the plant suffered injury.

Currently, inspection and confirmation of the equipment, materials, and infrastructure of the Yonezawa Plant are being conducted in preparation for restarting the operations. SUMCO intends to restart the operations
upon completion of inspection and confirmation, while assigning top priority to safety.

It should be noted that SUMCO operates several plants in the Kyushu region that manufacture the same products as the Yonezawa Plant, and a system of backup supply is presently being considered. Any further effects on the operations and performance of SUMCO will be announced without delay.