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      Idemitsu Kosan

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      Idemitsu Kosan Reviews

      3.6

      59% would recommend to a friend

      (39 total reviews)

      Kazuhisa Nakano

      81% approve of CEO

      55% positive business outlook

      Idemitsu Kosan has an employee rating of 3.6 out of 5 stars, based on 39 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Idemitsu Kosan employee rating is in line with the average (within 1 standard deviation) for employers within the Retail and wholesale industry (3.5 stars).

      Reviews by job title

      39 reviews
      4.0
      17 Dec 2025

      Good pay, bad work life balance

      Anonymous employee
      Recommend
      CEO approval
      Business outlook

      Pros

      Remuneration and pay is good

      Cons

      Work life balance is bad

      4.0
      17 Nov 2025

      good company

      Administration
      Recommend
      CEO approval
      Business outlook

      Pros

      One of the Japan's largest oil company, flexible working style

      Cons

      There are many detailed rules

      4.0
      19 Oct 2025

      Not bad

      Marine engineer
      Recommend
      CEO approval
      Business outlook

      Pros

      sufficient housing allowance stable performance good skilled officers

      Cons

      not sufficient bunus too long overtime in onboard Intimidating captains and chief engineers

      Viewing 1 - 3 of 39 Reviews
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      ReviewsIdemitsu Kosan reviews

      Glassdoor has 45 Idemitsu Kosan reviews submitted anonymously by Idemitsu Kosan employees. Read employee reviews and ratings on Glassdoor to decide if Idemitsu Kosan is right for you.