Investor Presentaiton

Segment Information ■ Operating + Equity Income [\ billions] 2Q FY2022 2Q FY2023 Change Petroleum 269.3 121.7 (147.6) (54.8%) Excluding inventory impact 61.1 105.0 +43.9 +71.9% Basic Chemicals 14.2 12.0 (2.2) (15.3%) Functional Materials 8.6 13.4 +4.8 +55.9% Power and Renewable Energy (2.9) (0.4) +2.4 Resources* 100.1 69.8 (30.3) (30.3%) Oil Exploration and Production 17.1 10.5 (6.6) (38.6%) Coal 83.0 59.3 (23.7) (28.5%) Others/Reconciliation (14.9) (5.2) +9.7 Total 374.3 211.2 (163.1) (43.6%) Excluding inventory impact 166.2 194.6 +28.4 +17.1% *Fiscal year for Coal Oil E&P and Coal included in the Resources Segment end in Dec. idemitsu Copyright Idemitsu Kosan Co., Ltd. All Rights Reserved. 18

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