- December 15, 2005 Share Cancellation of Treasury Stock
- December 15, 2005 Results of Tender Offer for Acquisition of Own Shares
- November 22, 2005 Notice of Tender Offer for Acquisition of Own Stock
- November 15, 2005 Presentation of 2005 3QYTD/3Q Results and FY Forecast is now available
- November 15, 2005 Notice of Stock Repurchase
- November 15, 2005 Revision of dividend forecast for fiscal year ended December 31, 2005
- November 15, 2005 Earnings Results for January 1 through September 30, 2005
- November 15, 2005 Revision of the Full Year Earnings Forecast 2005 (January - December 2005)
- August 23, 2005 Presentation of 1H 2005 Financial Results and Business Strategy
- August 22, 2005 Interim Earnings Results for the 1st half, 2005 (January - June 2005)
- July 28, 2005 Revision of the Interim Earnings Forecast for the 1st half, 2005 (January - June 2005)
- May 16, 2005 Presentation of "2005 1Q Results and 1H/FY Forecast" is now available
- May 16, 2005 Earnings Results for January 1 through March 31, 2005
- April 25, 2005 TonenGeneral Announcement of Personnel Change in Director
- April 4, 2005 ExxonMobil Japan Group Headquarters Integration of Takeshiba and Shinagawa Offices
- March 9, 2005 Notice of the Ordinary General Meeting of Shareholders
- March 1, 2005 Presentation of 2004 Financial Results and Business Strategy
- February 28, 2005 TonenGeneral Earnings Results for Full Year 2004
- February 18, 2005 Tonen Chemical Corp (TCC) Acquisition of Tonex
- January 27, 2005 Revision of the Earnings Forecast for 2004
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