List of officers and Executive structure

(as of April 1, 2026)

Members of the Board Representative Member of the Board Yutaka Oka

Representative Member of the Board

 Takahiro Yamamoto

Member of the Board

 Junichi Ishikawa

Member of the Board

 Kuniaki Manabe
Audit & Supervisory Board Member Aya Inada
Yutaka Wakaki
Executive Structure Representative Director & Executive Advisor to CEO Yutaka Oka ー
President & CEO Takahiro Yamamoto

Auditing Department,
Human Resources Department,
Corporate Planning Department,
New Business Development Department,
SAF Business Project,

Strategic Business
Development Project in Yamaguchi Operations
Executive Vice President Junichi Ishikawa

General Affairs Department,
Financial Department,
Information Systems Department,
International Petro-Materials Business Department,
Logistic Management Department,
Industrial Energy Sales Department,
Marketing & Sales Planning Department,
General Affairs Department Matsuyama,
Legal & Credit Department, Branches,
Shikoku Operations, Yamaguchi Operations,
Okinawa Operations,
Environment, Safety & Quality Control Department
Senior Vice President Masanori Ozaki Auditing Department
Senior Vice President Takakazu Matsuura Sub Leader, SAF Business Project
Executive Officer Azuma Bitou Financial Department,
Team Leader, Funding Team, SAF Business Project
Executive Officer Mamoru Watanabe Japan Underground Oil Storage Co., Ltd.
Executive Officer Yusuke Tabuchi Taiyo Oil Sales Co., Ltd.
Executive Officer Yasuhiro Funaki International Petro-Materials Business Department,
Team Leader, Overseas raw materials procurement and sales team, SAF Business Project
Executive Officer Takashi Suzuki

General Affairs Department,
General Affairs Department Matsuyama
Executive Officer Norio Yamakawa Taiyo Oil Sales Co., Ltd.
Executive Officer Noriyuki Maniwa Human Resources Department,
Information Systems Department,
Legal & Credit Department
Executive Officer

Kuniaki Manabe

 General Manager, Shikoku Operations
Refining Department,
Oil Transfer Department,
Plant Engineering Department
Executive Officer

Takahiro Ishizuka

Marketing & Sales Planning Department,
Branches,
Okinawa Operations
Executive Officer

Yoshihiko Soeda

Logistic Management Department,
Industrial Energy Sales Department,
Team Leader, Domestic raw materials procurement and sales team, SAF Business Project
Deputy Executive Officer

Kazuhiro Onishi

Deputy General Manager, Shikoku Operations
General Affairs Department,
Production & Technology Department,
Environment & Safety Department
Deputy Executive Officer

Satoshi Miyazaki

Corporate Planning Department

(General Manager, Corporate Planning Department)
Deputy Executive Officer

Shinji Miyake

New Business Development Department (General Manager, New Business Development Department),
Yamaguchi Operations

Corporate Information