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Idemitsu Kosan Co., Ltd.
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Integrated Energy
/ Tokyo
1-2-1 Otemachi, Chiyoda-ku, Tokyo
100-8321
5019
https://www.idemitsu.com/en/index.html
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#EN255

Description

Idemitsu Kosan is Japan's second-largest petroleum refiner (after Eneos), an integrated energy company engaged in oil and gas exploration, refining, petrochemicals, lubricants, functional materials, and power generation across approximately 20 countries. The company operates retail fuel stations under the apollostation brand following its 2019 merger with Showa Shell Sekiyu.

Key Corporate History

Year Event
1911 Founded by Sazo Idemitsu in Moji, Kita-Kyushu as a lubricants trader
1940 Incorporated as Idemitsu Kosan Co., Ltd.; HQ moved to Tokyo
2006 Listed on Tokyo Stock Exchange
2019 Merger with Showa Shell Sekiyu completed (April);
Saudi Aramco becomes major shareholder; apollostation brand launched
2022 TOA Oil Co., Ltd. acquired 100% (delisted December 2022)
2023 Shell fuel brand license discontinued; all stations rebranded apollostation

Business Segments

Segment Key Activities
Petroleum Products Refining, marketing of gasoline, jet fuel,
diesel, heavy oil; apollostation retail network
Basic Chemicals Ethylene, propylene,
petrochemical intermediates
Functional Materials OLED materials, engineering plastics,
performance chemicals
Power & Renewable Energy Gas-fired and
renewable power generation
Resources Upstream E&P
(crude oil, natural gas, coal)
Lubricants Industrial and automotive lubricants
(global)

Key Refining Assets (Japan)

Idemitsu operates four refineries in Japan with a combined crude distillation capacity of approximately 540,000 bpd:

  • Hokkaido Refinery – Tomakomai, Hokkaido

  • Chiba Refinery – Ichihara, Chiba

  • Aichi Refinery – Tobishima, Aichi

  • Yamaguchi Refinery – Shunan, Yamaguchi

  • Keihin Refinery (via subsidiary TOA Oil Co., Ltd.) – Kawasaki, Kanagawa (Flexicoking unit, 27 kb/d)

 

List of Refineries/Complexes

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Modified by UserPic   Kokel, Nicolas 4/30/2026 1:15 PM
Added by UserPic   Braun (Sysadmin), Uwe 7/29/2021 9:21 PM