Integrated Report 2023

I. Financial Highlights and Business Progress Major Business Progress in the First Half of FY3/24 E&P Field 【Domestic) • JAPEX Additional development of Katakai gas field in Niigata : Completion of the first well (May) / Start drilling of the second well (Aug) 【Overseas) • . • Capital participation in a subsidiary of U.K.-based Longboat Energy PLC (Longboat JAPEX Norge AS : LBJ) which promotes exploration and development in offshore Norway (May) Acquisition of additional well interests in tight oil development project in U.S. (May) Started production of crude oil and natural gas at the Seagull project in U.K. North Sea (Nov) I/U Field [Development of domestic renewable energy】 • Established PJ Asset Management Co., Ltd., to develop, manage and operate of solar power generation projects (Jun) • Started operation of Mitsuke PV Power Plant, Niigata (Aug) • Invested in Storage battery-related company PowerX, Inc (Aug) [LNG transport and supply] • Conducts Feasibility Study of Energy Service Utilizing LNG to the Industrial Park in Northern Vietnam (Aug) • • • CN Field Agreed on Joint Evaluation with JFE Steel Corporation to Establish CCS Value Chain Originated from Japan Aligned with CCS Study in Malaysia (Jun) Presented a carbon recycling scenario utilizing inter-industry collaboration in Tomakomai (Jul) Signed Joint Study Agreement Towards CO2 Injection Field Test at Sukowati Oil Field in Indonesia (Jul) CCS Studies in Tomakomai Area and East-Niigata Area were commissioned as the "Business Feasibility Study on Japanese Advanced CCS Project" by JOGMEC in FY2023 (Jul and Aug) Signed MOU with SKK Migas for cooperation in realizing CCS/CCUS Hub & Clusters in Indonesia (Sep) Launched our first concrete CCS commercialization study in advanced overseas country by capital participation in Blue Spruce Operating LLC of the U.S. (Oct) Copyright 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved. LO

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