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Idemitsu Kosan, Apr-Dec (Cumulative 3Q) Ordinary Profit Decreases by 67%, Oct-Dec Ordinary Profit Decreases by 52%
Consolidated Financial Results [Japan GAAP] for the nine months ended December 31, 2025
Presentation on Results for the 3rd Quarter FY2025
[Delayed] Final Investment Decision and Construction Start for Large Pilot Facility for Solid Electrolytes (All-Solid-State Battery Material)
Mitsui Chemicals, Idemitsu Kosan, and Sumitomo Chemical Concluded a Definitive Agreement for the Business Integration
Idemitsu Kosan and Mitsui Chemicals Reach Final Agreement on Consolidating Chiba Ethylene Complexes to Optimize Production
Notice Concerning Change in Major Shareholders
Announcement Regarding Acquisition and Retirement of Treasury Shares
Announcement on Revisions to Consolidated Earnings Forecasts for the Fiscal Year Ending March 2026
Consolidated Financial Results [Japan GAAP] for the six months ended September 30, 2025
Presentation on Results for the 2nd Quarter FY2025
Idemitsu Kosan, Ordinary Profit Forecast for the Fiscal Year Revised Upward by 52%
Notice Regarding Results of Tender Offer for Shares of Fuji Oil Company, Ltd. and Change in the Subsidiary
One of the World's Largest Black Pellet Plants Starts Commercial Production
[Correction] Idemitsu ESG Data Book 2025
Notice Regarding Commencement of Tender Offer for Shares of Fuji Oil Company, Ltd. (Securities Code 5017)
Mitsui Chemicals, Idemitsu Kosan, and Sumitomo Chemical Enter Into MOU
Idemitsu ESG Data Book 2025
Idemitsu Integrated Report 2025
Notice Regarding Receipt of Dividends from Consolidated Subsidiary