Investor Presentaiton

I. Financial Highlights and Business Progress JAPEX Main Updates on Shareholders return and ESG items FY2022 result FY2023 outlook Share- holders return E S G ESC G Introduced a consolidated dividends payout ratio of approx. 30% (in FY2023) Completed repurchase of shares (Aug) and cancelled all repurchased shares (Sep) Actual dividends: 370 yen per year (Interim 150 yen + year-end 220 yen, Dividend payout ratio 29.9%) Established the CN Business Committee (Apr) Participated in Global CCS Institute (May) • Participated in CCS+ Initiative (Jun) ● Endorsed of GX League (Jun) • Evaluated as A- score for CDP of Climate Change (Dec) 【Strengthen Human Capital Management) • Implemented the "Comeback Recruitment" program for alumni (Jul) Expanded the incentive plan for employee stock ownership (Sep) Introduced a incentive program to acquire DX certification for digital human resources development (Jan) • Renewed a HR management system (Mar) [Digital transformation (DX)] Started a company-wide BPR study (Nov) Launched an internal SNS including a portal site function (Jan) [Others] Started a clothes casualization trial in office hours (Mar). Established the Human Rights Policy (Mar) Linked a portion of executive compensation to the result of climate change response (in FY2022) Promoting diversity on the Board of Directors (Jun) ➤ Increased the number of outside directors (from 4 to 5), Increased in the number of female directors (from 1 to 2) Annual dividends forecast: 200.0 yen per share (Interim 100 yen + year-end 100 yen, dividend payout ratio 31.9%) + Enhance the climate change-related disclosures + Strengthen activities to realize a CN society, including GX-related activities [Digital transformation (DX)] Started to consider the optimization of domestic business operations as a part of DX promotion (Apr) 【Other】 Introduced of same-sex partnership system (Apr) + Enhance the investment in human capital and related disclosures + Promote optimization of organization and operations by utilizing DX and other measures Renewed the Takeover Defense Measures (plan to propose at the Ordinary General Meeting of Shareholders to be held in June) + Responding to TSE requirement to increase shareholder value Copyright 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved. 8

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