Investor Presentaiton

Segment Information ■Factors Affecting Operating + Equity Income (excluding inventory impact, Compared to the 5/9 forecasts) Exchange [\ billions] Consolidated adjustment, etc rate, etc. 5.0 220.0 Performance Price Chemicals, etc. 5.0 Vietnam Volume 3.0 Export Margin Power 3.0 4.0 core products margin (time-lag) Volume 3.0 27.0 6.0 non-core products (5.0) margin 9.0 (6.0) 185.0 5/9 Forecasts idemitsu fuel cost, etc. (15.0) (4.0) Oil E&P +3.0 Coal +11.0 Petroleum +17.0 Basic Functional Power/ Chemicals Materials Renewable ±0.0 +4.0 Energy (5.0) +35.0 Resources +14.0 Others +5.0 Revised Forecasts Copyright Idemitsu Kosan Co., Ltd. All Rights Reserved. 28

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