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Idemitsu Kosan

Idemitsu Kosan is a publicly listed integrated oil and gas company headquartered in Japan. In 2020, it had USD 55.60 billion in revenue and a reported 4,917 employees*. Idemitsu’s climate strategy lacks ambition and detail, and its acquisition of Showa Shell in 2019 has led to a significant increase in emissions. The company shows no intention to transition away from fossil fuels.

Ranking position
#58 /100
Total score
4.3 /100
Performance score
1.8 /20
Narrative Score
Trend Score
  • Trend line is up
  • Trend line is equal
  • Trend line is down
Performance module name Performance module score Rank (0-100)


14.5 /100 #21

Material Investment

0.0 /100 #84

Intangible Investment

0.0 /100 #20

Sold products

0.0 /100 #55


44.3 /100 #31

Supplier Engagement

12.5 /100 #33

Client Engagement

7.5 /100 #37

Policy Engagement

10.0 /100 #69

Business Model

5.0 /100 #37

Leading practices

No leading practices were identified for this company.

Risks and opportunities


Idemitsu Kosan receives a trend score of -. If the company were reassessed in the near future, its score would likely decrease. If the company’s past trend in scope 1, 2 and 3 emissions intensity continues and the company follows a business-as-usual pathway, it will only diverge further from its 1.5°C pathway, which requires a near 4% annual emissions reduction. Many of the company’s actions, such as continuing its coal mining business, acquiring Showa Shell and increasing oil and gas production in Norway and Vietnam, suggest it will continue to be overwhelmingly dependent on fossil fuels and show its lack of intention to achieve a low-carbon transition.

Progress towards the Paris Agreement

See results for

  1. 2023

More about the company

Tokyo, Japan
Group revenue
JPY 6,045,800,000,000 (USD 55.60 billion)
Ownership structure
Publicly listed
Number of employees
Scope of activity