Directors & Officers

Shunichi Kito

Representative Director and Chairman

Shunichi Kito

April 1980

Joined Idemitsu Kosan Co.,Ltd.("Idemitsu Kosan")

April 2005

Deputy General Manager of Personnel Department, Idemitsu Kosan

July 2008

Deputy General Manager of Accounting Department, Idemitsu Kosan

June 2011

Executive Officer and General Manager of Accounting Department, Idemitsu Kosan

June 2013

Director, Managing Executive Officer and General Manager of Accounting Department, Idemitsu Kosan

June 2014

Managing Director, Idemitsu Kosan

June 2017

Executive Vice President and Director, Idemitsu Kosan

April 2018

Representative Director & Chief Executive Officer, Idemitsu Kosan

April 2019

Representative Director, President and Chief Executive Officer, Idemitsu Kosan

June 2022

Representative Director, President and Chief Executive Officer, Idemitsu Kosan

September 2022

President, Petroleum Association of Japan (current)

April 2025

Representative Director and Chairman, Idemitsu Kosan (current)

Noriaki Sakai

Representative Director and President

Noriaki Sakai

April 1985

Joined Idemitsu Kosan Co.,Ltd.("Idemitsu Kosan")

July 2010

Deputy General Manager of Tokuyama Refinery and Deputy General Manager Of Tokuyama Plant, Idemitsu Kosan

July 2012

Deputy General Manager of Human Resource Department, Health Insurance Union President and Corporate Pension Fund President, Idemitsu Kosan

July 2015

Deputy General Manager of Accounting Department, Idemitsu Kosan

June 2017

General Manager of Accounting Department, Idemitsu Kosan

July 2018

Executive Officer and General Manager of Accounting Department, Idemitsu Kosan

April 2019

Executive Officer and General Manager of Finance Department, Idemitsu Kosan

July 2020

Senior Executive Officer Chief Financial Officer, Idemitsu Kosan

June 2021

Director, Managing Executive Officer, Idemitsu Kosan

June 2022

Director, Executive Vice President, Idemitsu Kosan

June 2023

Representative Director, Executive Vice President, Idemitsu Kosan

April 2025

Representative Director and President, Idemitsu Kosan (current)

Atsuhiko Hirano

Representative Director and Executive Vice President

Atsuhiko Hirano

April 1985

Joined Showa Shell Sekiyu K.K. ("Showa Shell")

September 2002

General Manager, Shizuoka Area, Showa Shell

September 2004

General Manager, Marketing Planning Division, Showa Shell

March 2005

Executive Officer and General Manager, Marketing Planning Division, concurrently serving as General Manager, Retail Sales Division, Showa Shell

March 2006

Director, Showa Shell

March 2009

Corporate Executive Officer, Showa Shell

March 2013

Senior Corporate Executive Officer, Showa Shell

July 2014

Representative Director, President, Solar Frontier K.K.

April 2019

Managing Executive Officer of the Company, Idemitsu Kosan Co.,Ltd. ("Idemitsu Kosan")

June 2020

Director, Managing Executive Officer, Idemitsu Kosan

June 2022

Director, Executive Vice President, Idemitsu Kosan

June 2023

Representative Director and Executive Vice President, Idemitsu Kosan (current)

Masahiko Sawa

Representative Director and Executive Vice President

Masahiko Sawa

April 1990

Joined Idemitsu Kosan Co.,Ltd.("Idemitsu Kosan")

April 2013

Deputy General Manager of Gas Business Department, Idemitsu Kosan

June 2017

General Manager of Technology & Engineering Center, Idemitsu Kosan

April 2019

Executive Officer and General Manager of Hokkaido Refinery, Idemitsu Kosan

June 2021

Senior Executive Officer (in charge of Manufacturing & Technology), Idemitsu Kosan

June 2022

Director, Managing Executive Officer, Idemitsu Kosan

June 2024

Director, Executive Vice President, Idemitsu Kosan

June 2025

Representative Director and Executive Vice President, Idemitsu Kosan (current)

Masakazu Idemitsu

Director (Non-Executive)

Masakazu Idemitsu

April 2010

Councilor, Public Interest Incorporated Foundation Idemitsu Museum of Arts (current)
Councilor, Public Interest Incorporated Foundation Idemitsu Culture and Welfare Foundation

December 2015

Director and Vice President, Nissho Kosan Co., Ltd.("Nissho Kosan")

April 2016

Representative Director and President, Nissho Kosan (current)

April 2019

Director, Idemitsu Kosan Co.,Ltd. ("Idemitsu Kosan") (Non-Executive) (current)
Representative Director and President, Showa Kosan Co., Ltd. (current)

May 2020

Representative Director and President, MI Power Co., Ltd. (current)

October 2020

Representative Director, General Incorporated Association Idemitsu Philosophy Laboratory (current)

April 2021

Representative Director, General Incorporated Association Idemitsu Kosan Corporate History and Philosophy Laboratory (current)

August 2024

Representative Director and President, ZEN Co., Ltd. (current)
Representative Director and President, ENN Co., Ltd. (current)

Kazunari Kubohara

Director (Non-Executive)

Kazunari Kubohara

December 2008

Registered as an attorney, established Kyuhodo Law Firm (current)

April 2010

Committee Member, Tokyo Local Third-Party Committee to Check Pension Records, Ministry of Internal Affairs and Communications

April 2011

Delegate, Dai-Ichi Tokyo Bar Association

September 2015

Auditor, General Incorporated Association for Realizing Prescription of Adequate Amount of Anti-Dementia Drugs

June 2016

Outside Statutory Auditor, Class Technology Co., Ltd.

July 2017

Auditor, Medical Corporation Hakueikai Miyake Dental Clinic (current)

March 2018

Delegate, Japan Federation of Bar Associations

April 2018

Vice Chairperson of the Legal Services Obstruction Countermeasures Committee, Dai-Ichi Tokyo Bar Association

April 2019

Director, Idemitsu Kosan Co.,Ltd. (Non-Executive) (current)

Takeo Kikkawa

Outside Director

Takeo Kikkawa

April 1987

Associate Professor, Aoyama Gakuin University School of Business

October 1993

Associate Professor, Institute of Social Science, University of Tokyo

April 1996

Professor, Institute of Social Science, University of Tokyo

April 2007

Professor, Hitotsubashi University Graduate School of Commerce and Management

January 2013

President, Business History Society of Japan

June 2013

Outside Director, Mitsubishi Chemical Holdings Corporation

April 2015

Professor, Graduate School of Innovation Studies, Tokyo University of Science (currently,Graduate School of Management, Tokyo University of Science)

June 2017

Outside Director, Idemitsu Kosan Co.,Ltd. (current)

April 2020

Professor, Graduate School of International Management, International University of Japan

April 2021

Vice President, and Professor, Graduate School of International Management, International University of Japan

September 2023

President, International University of Japan (current)

Jun Suzuki

Outside Director

Jun Suzuki

April 1983

Joined Teijin Limited

April 2002

General Manager, Bio-Medical Evaluation Research Department, Pharmaceutical Discovery Research Laboratories, Teijin Limited

October 2003

General Manager, Pharmaceutical Planning Department, Teijin Pharma

April 2011

Teijin Group Chief Representative of Europe
President, Teijin Holdings Netherlands B.V. 

April 2012

Teijin Group Corporate Officer
Chief Marketing Officer and Director for BRICs Business

April 2013

Teijin Group Executive Officer
General Manager, Advanced Fibers & Composites Business Group
General Manager, Carbon Fibers & Composites Business Unit
President and Representative Director, Toho Tenax Co., Ltd.

June 2013

Member of the Board, Executive Officer, Teijin Limited
General Manager, Advanced Fibers & Composites Business Group
General Manager, Carbon Fibers & Composites Business Unit
President and Representative Director, Toho Tenax Co., Ltd.

April 2014

President and CEO, Representative Director of the Board, Teijin Limited

April 2022

Chairperson, Member of the Board, Teijin Limited
Executive Member of the Policy Board, Japan Business Federation (Keidanren) (current)

June 2022

Outside Director, The Midori Kai Co., Ltd. (current)
Chairman, Japan-Thailand Trade and Economic Committee, Keidanren (current)

January 2023

Member, APEC Business Advisory Council (ABAC) (current)

April 2023

Vice Chairman, Executive Director, Japan Association of Corporate Executives (KEIZAI DOYUKAI) (current)

June 2023

Senior Advisor, Teijin Limited (current)
External Director, MS&AD Insurance Group Holdings, Inc. (current)
Outside Director Idemitsu Kosan, Co., Ltd. (current)

March 2025

Executive Member of the Council for Science, Technology, and Innovation (Cabinet Office, JAPAN) (current)

Shiori Nagata

Outside Director

Shiori Nagata

April 2000

Joined Deloitte Tohmatsu Consulting, Inc.

January 2005

General Manager of Corporate Planning, Tohato Inc.

April 2006

General Manager of Corporate Planning, Accounting, Financing and Supply Chain Management, Tohato Inc.

January 2007

Unison Capital Inc

January 2011

Vice President, INCJ, Ltd.

January 2015

Executive Officer, General Manager of the Recreational Marine Business Unit, Yanmar Co., Ltd. 
Representative Director and President, YANMAR Marine International B.V.

April 2020

Director, Chief Strategy Officer, and Head of the Management Strategy Division, Yanmar Holdings Co., Ltd.

November 2022

Temporary Committee Member of Industrial Structure Council, Ministry of Trade, Economy and Industry (Committee on New Direction of Economic and Industrial Policies, Manufacturing Industry Committee) (current)

May 2023

Advisory Board member of Dutch & Japanese Trade Federation (current)

April 2024

Director, Yanmar Holdings Co., Ltd. (current)

June 2024

Member of the Board Member of the Audit Committee, NEC Corporation (current)  
Outside Director, Idemitsu Kosan Co.,Ltd. (current)

September 2024

Administrative Counsel Member of Japan External Trade Organization (current)

Hidefumi Kodama

Audit & Supervisory Board Member

Hidefumi Kodama

April 1987

Joined Idemitsu Kosan Co.,Ltd.("Idemitsu Kosan")

July 2011

Manager of Finance Management Section, Accounting Department, Idemitsu Kosan

July 2013

Manager of Planning & Coordination Office, Exploration & Production Department 1, and Director,Idemitsu Kosan and General Manager of General Affairs Department, Idemitsu Oil & Gas

April 2015

General Manager of Exploration & Production Planning Department, Idemitsu Kosan

July 2017

General Manager of Public Relations & CSR Affairs Office and in charge of brand strategy, Idemitsu Kosan

April 2018

General Manager of Public Relations Department, and in charge of brand strategy, Idemitsu Kosan

April 2019

General Manager of Coal Business Department, Idemitsu Kosan

April 2021

General Manager of Coal and Energy Solution Department, Idemitsu Kosan

June 2022

Audit & Supervisory Board Member, Idemitsu Kosan (current)

Yumiko Ichige

Outside Audit & Supervisory Board Member

Yumiko Ichige

April 1989

Registered as an attorney (Daini Tokyo Bar Association)
Law Department, IBM Japan, Ltd.

December 2007

Partner, Nozomi Sogo Attorneys at Law (current)

April 2009

Vice Chairman, Daini Tokyo Bar Association

June 2012

Outside Director, NEC Networks & System Integration Corporation

April 2014

Executive Director, Japan Federation of Bar Associations

May 2014

Outside Audit & Supervisory Board member, AEON MALL Co., Ltd.

December 2014

Outside Director, Audit & Supervisory Committee member, SANYO TRADING CO., LTD.

December 2016

Outside Director, Audit & Supervisory Committee member, FOOD & LIFE COMPANIES LTD. (current)

June 2018

Outside Director, ITOHAM YONEKYU HOLDINGS INC.
National Research and Development Agency Council member, Ministry of Land, Infrastructure,Transport and Tourism

January 2019

Information and Communications Council member, Ministry of Internal Affairs and Communications

March 2020

Outside Director, ASKUL Corporation (current)

June 2022

Outside Audit & Supervisory Board Member, Idemitsu Kosan Co.,Ltd. (current)

October 2023

Board Director (Non-Executive) Audit and Supervisory Committee members of Hitachi Astemo, Ltd. (currently, Astemo, Ltd.) (current)

Masahiko Tezuka

Outside Audit & Supervisory Board Member

Masahiko Tezuka

October 1986

Joined Chuo Audit Corporation

March 1990

Registered as a Certified Public Accountant

July 2002

Representative, ChuoAoyama Audit Corporation

October 2005

Executive board member, ChuoAoyama Audit Corporation

May 2006

COO, ChuoAoyama Audit Corporation

October 2007

Partner, Executive board member, Deloitte Touche Tohmatsu (currently, Deloitte Touche Tohmatsu LLC)

July 2016

Executive board member, The Japanese Institute of Certified Public Accountants (JICPA)

July 2019

Chairmen , JICPA
CEO, Japan Foundation for Accounting Education and Learning (current)

May 2022

Auditor,General Incorporated Association Japan Association of Corporate Directors (current)

July 2022

Advisor, JICPA (current)
Chair of Councilors, Financial Accounting Standards Foundation (current)

June 2023

Outside Director (and Audit & Supervisory Committee Member), Mizuho Bank, Ltd.

September 2023

Outside Auditor, Kagayaki Holdings, Inc. (current)

June 2024

Outside Audit & Supervisory Board Member, Idemitsu Kosan Co.,Ltd. (current)

June 2025

Outside Director, Mizuho Financial Group, Inc. (current)

Director

Audit & Supervisory Board Member

Audit & Supervisory Board Members

*As of June 25, 2025

Executive Officer

Shunichi Kito

Chairman

Noriaki Sakai

President

Atsuhiko Hirano

Executive Vice President

Responsible for Oversea Business Strategy, Energy Resources Business Strategy, Corporate Solution Business and LPG Business Strategy

Masahiko Sawa

Executive Vice President

Responsible for Corporate Strategy, Human Capital Strategy and Carbon Neutral Transformation Strategy, and Head of Safety & Environmental Protection Headquarters, 
Head of Quality Assurance Headquarters and Head of Carbon Neutral Transformation Strategic Headquarters

Hajime Nakamoto

Senior Managing Executive Officer and President, Advanced Materials Company

Advanced Materials Company (Innovation Strategy Department, Electronic Materials Department, Lithium Battery Material Department, Advanced Materials & Performance Chemicals Department, Bitumen Department, Idemitsu Unitech, and SDS Biotech), and Intellectual Property and Research (Advanced Technology Research Laboratories and Intellectual Property Department)

Soichi Kobayashi

Senior Managing Executive Officer

Chief Digital Officer, Digital & ICT, Power & Renewables Business and Mobility Planning (Digital & ICT Department, Power & Renewables Business Department and Mobility Planning Department)

Kenichi Morishita

Managing Executive Officer

General Affairs, Legal and Public Relations (General Affairs department, Legal Department and Public Relations Department) and Economic Strategy

Kenya Maeda

Managing Executive Officer

Integrated Supply & Trading (Integrated Supply & Trading Department, Crude & Global Business Department, LPG Office 1, Idemitsu International (Asia), and Idemitsu Tanker)

Junzo Yamamoto

Managing Executive Officer

Manufacturing & Technology ( Manufacturing & Technology Department, Carbon Neutral Transformation Department, Basic Chemicals Department, Technology & Engineering Center, Idemitsu Engineering, Showa Yokkaichi Sekiyu, Toa Oil, and Seibu Oil) 

Hiroshi Watanabe

Senior Executive Officer

Chief Procurement Officer and Head of Procurement Headquarters

Takashi Sakata

Senior Executive Officer

Chief Financial Officer and General Manager of Finance & Accounting Department

Yoshiki Terasaki

Senior Executive Officer

Lubricants Business (Lubricants Department 1, Lubricants Department 2, Idemitsu Lube (China), Idemitsu Lube Asia Pacific, Idemitsu Lubricants America, and Idemitsu NTG)

Yoshimasa Kokubo

Senior Executive Officer

Marketing(Petroleum Marketing Department, Distribution & Operations Department, Apollo Link, Idemitsu Retail Marketing, Idemitsu Energy Solutions, and Idemitsu Credit)and General Manager of Petroleum Marketing Department

Hiroshi Akiya

Senior Executive Officer

General Manager of Manufacturing & Technology Department

Yuzo Yoshida

Senior Executive Officer

B2B Business Platform and General Manager of Coal and Energy Solution Department

Shintaro Ishida

Senior Executive Officer

General Manager of Corporate Planning Department

Michiyo Terakami

Executive Officer

Regional Revitalization Business

Mitsuhide Hachiyama

Executive Officer

Regional Revitalization Business and General Manager of Regional Revitalization Business Department

Jun Miki

Executive Officer

Vietnam Project

Minoru Yagyuuda

Fellow

Carbon Neutral Transformation Project and Offshore Wind

Tetsuji Mishina

Executive Officer

General Manager of Lithium Battery Material Department, Advanced Materials Company

Jotaro Kobayashi

Executive Officer

Vice President, Advanced Materials Company

Yoshitaka Onuma

Executive Officer

Business Investment and General Manager of Business Investment Office

Makoto Shimada

Executive Officer

General Manager of Crude & Global Business Department

Yoshihiko Ota

Executive Officer

General Manager of Tokuyama Complex

Motohiro Suzuki

Executive Officer

General Manager of Advanced Technology Research Laboratories

Masanori Abe

Executive Officer

General Manager of Oil & Gas Exploration and Production

Yoshihiro Fujikata

Executive Officer

Vice President, Advanced Materials Company

Kazuma Ikeda

Executive Officer

General Manager of Human Resources Department

Takashi Inoue

Executive Officer

General Manager of Chiba Complex

Kyoichi Inoue

Executive Officer

General Manager of Lubricants Department 1

Hideyuki Hara

Executive Officer

General Manager of Hokkaido Refinery

Masahide Takano

Executive Officer

General Manager of Aichi Complex

Hidenori Tanaka

Group Regional Head for Southeast Asia

Managing Director of Idemitsu International Asia

Kazumi Kikuchi

Group Regional Head for Americas

Chairman of Idemitsu Americas Holdings, 
Head of Lubricants Business in North/South America and 
Chairman of Idemitsu Lubricants America