Idemitsu Kosan : Integrated Report 2025 Contents and Editorial Policy

CONTENTS 1 Contents and Editorial Policy

Value Creation Story

1. Origins and History

2. The Current Idemitsu Group

3. Value Creation Process

   Message from Top Management

4. Message from the Chairman

5. Message from the President

Business Structure Reforms

11 Message from the CFO

1. Initiatives for Achieving Carbon Neutrality by 2050

2. Taking on the Future in the Advanced Materials Domain / Restructuring R&D to Accelerate Innovation

3. FY2024 Review of Operations

4. Petroleum Segment

1. Basic Chemicals Segment

2. Functional Materials Segment

26 Power and Renewable Energy Segment 27 Resources Segment

Human Capital / Human Capital Strategy

28 Message from the Officer in Charge of Human Resources 30 Key Issues in Human Capital Strategy for FY2025 33 Implementation of the Human Capital Strategy

Evolution of the Business Platform / Innovation Management

Evolution of the Business Platform

38 DX Strategy 39 Procurement Transformation Activities 40 Risk Management and Internal Controls

Innovation Management

42 Innovation Creation Activities 44 Intellectual Property Activities

Sustainability

47 Idemitsu Group's Sustainability and Materiality (Key Challenges) 49 Climate Change Action 53 Biodiversity and Water Resource Conservation

1. Circular Society, Waste and Chemical Substances

2. Safety, Environment, and Quality Management

1. Human Rights

   
   
   

2. Information Management / Security Management

3. Compliance

Corporate Governance

62 Outline of Corporate Governance System 63 Directors and Audit & Supervisory Board Members 65 Overview of Board of Directors and Assessment of Effectiveness 67 Selection of Officers / Skill and Career Matrix

1. Compensation for Executives

2. Overview of the Nomination and Compensation Advisory Committee

3. Status of the Activities by the Audit & Supervisory Board

   Data Section

4. Financial Highlights

5. Non-Financial Highlights

6. Selected Financial Data

7. Company Profile / Stock Information

Thoughts embodied in the cover design

The design was inspired by our 2030 Vision, Your Reliable Partner for a Brighter Future, and our 2050 Vision, Shaping Change. The overlapping curves express our dynamic and flexible approach to continuous challenge, while the spheres of various sizes symbolize diversity. Together, they embody our aspiration to further expand the possibilities of value creation through harmony.

Editorial Policy

Data collection

Reports

This report presents both financial and non-financial information, focusing on specific initiatives undertaken in FY2024. It aims to communicate to a broad range of domestic and international stakeholders the initiatives we are implementing in existing businesses, the progress we are making toward business structure reforms, and our work toward sustainable enhancement of corporate value through better nurturing of personnel.

Website

To deepen understanding of these efforts, we have, for the first time, included insights and comments from on-the-ground personnel. We encourage you to read their perspectives.

Financial information Non-financial information

Annual Securities Report

Corporate Governance Report

Idemitsu Integrated Report

FACT Book

Idemitsu ESG Data Book

Sustainability Website

IR Information Website

Communications Media

Scope of the Reporting

As a general rule, this report covers Idemitsu Kosan Co., Ltd. and our 263 Group companies as of the end of June 2025. When the scope differs, this fact is noted.

Reporting Period

Results for FY2024 (April 1, 2024 - March 31, 2025) are included in this report. When the applicable period differs, this fact is noted. Activities since April 2025 are also included.

Publication Information

Japanese version: Published annually since 2001, and the previous edition was published in October 2024.

English version: Published annually since 2003.

Reference Guidelines

We refer to the international integrated reporting framework recommended by IFRS Foundation, TCFD (Task Force on Climate-related Financial Disclosures), the Ministry of Economy,

Trade and Industry's Guidance for Collaborative Value Creation, GRI Sustainability Reporting Standards, ISO 26000, and SASB (Sustainability Accounting Standards Board).

Disclaimer on Forward-looking Statements

Any plans, projections, or targets contained in this report that are not historical facts are based on decisions and assumptions made by the Company using information currently available. Actual results may differ substantially from forecasts due to various factors. Factors that may affect the results of operations include economic conditions, crude oil prices, petroleum product supply and demand, market conditions, and currency exchange rates, but are not limited to these factors.

Contact point for inquiries about Idemitsu Integrated Report

Idemitsu Kosan Co., Ltd. Contact form on the official website: