Oct 29, 2007

Press Release

Consolidated Financial Summary (for the first half year ended September 30,2007)

Oct 17, 2007

Press Release

Subsidiary Established in Republic of Peru

Sep 13, 2007

Press Release

Revision of Performance Forecasts

Jul 27, 2007

Press Release

Unaudited Consolidated Financial Summary (for the first quarter ended June 30, 2007)

Apr 6, 2007

Press Release

New Chairman and President are to be appointed

Apr 2, 2007

Press Release

Metal Production Plan for the First Half of Fiscal 2007

Mar 29, 2007

Press Release

Feasibility Study Contract Concluded for Taganito Project

Mar 26, 2007

Press Release

New Enabling Optical Isolator Developed for FTTx Solutions

Mar 23, 2007

Press Release

Additional Equity Acquired in Sumitomo Metal Industries

Mar 6, 2007

Press Release

Revisions of Results and Divident Forecasts

Feb 19, 2007

Press Release

New Medium-Term Business Plan

Feb 19, 2007

Press Release

Introduction of Countermeasures Large-scale Acquisitions of Sumitomo Metal Mining Shares (Takeover Defense Measures)

Jan 31, 2007

Press Release

Unaudited Consolidated Financial Summary (for the third quar ter ended December 31, 2006)

Jan 9, 2007

Press Release

Expansion at Cerro Verde Mine in Peru Copper Concentrate Production