ROHM Announces Shelf Registration of Stock Acquisition Rights

ROHM CO., LTD. ("ROHM") announced on November 9, 2006 that its Board of Directors resolved to file a shelf registration statement with the Japanese regulatory authorities for possible issues of stock acquisition rights as follows;

1.Type of Securities Stock acquisition rights 2.Issuable Period 2 years from the effective date of the shelf registration of stock acquisition rights (from November 17, 2006 to November 16, 2008) 3.Method of Offering Rights offering to shareholders 4.Issuable Amount 300 million yen (Issuable amount is the total amount to be paid upon exercise of all stock acquisition rights. The issue price of a stock acquisition right is zero yen.)

ROHM announced on May 11, 2006 that its Board of Directors has adopted Fair Rules for the Acquisition of Substantial Shareholdings (Takeover Defense Measure) ("the Plan"). The purpose of the Plan is to preserve and enhance corporate value and the common interests of the shareholders. The Board requests that any bidder follow the Plan to commence a takeover proposal, and if the bidder has not follow the procedures required by the Plan, the Board intends to take certain measures as provided in the Plan. The issuance of stock acquisition rights is the countermeasure if the bidder has not followed the procedures required by the Plan, and this shelf registration enables ROHM to promptly issue stock acquisition rights if it deems necessary. For further details, please see the press release on May 11, 2006 on our website (http://www.rohm.com/financial/pdf/defence.pdf).