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Idemitsu Kosan refines and sells oil, fuel, and petrochemical products, and runs a large network of service stations in Japan.
Idemitsu Kosan is one of Japan's big oil companies. It turns crude oil into the things people actually use — gasoline for cars, diesel for trucks, jet fuel, lubricants for engines, and the raw chemical ingredients that go into plastics and other products. It sells most of this through its own branded service stations across Japan, along with a wholesale business that supplies fuel and petrochemical products to other companies.
The service station network is the part most people know. Idemitsu runs thousands of stations, many under brands like apollostation, and it makes money not just from the fuel pumped into tanks but from the goods sold inside — snacks, drinks, car care products, and everyday convenience items. Drivers choose a station because it is close, the fuel is reliable, and the shop is convenient. That retail footprint gives Idemitsu a steady, everyday relationship with millions of Japanese drivers. There is a bigger, less visible side too. Idemitsu is a major refiner, meaning it operates the huge industrial plants that cook crude oil into usable fuels and chemicals. That business is capital-heavy and exposed to the wild swings of oil prices and refining margins — the gap between what crude costs and what refined products sell for. When that gap is wide, refiners make easy money. When it is narrow, they can lose money. This is why Idemitsu, like its peers, is sensitive to global energy markets it does not control. The company has been reshaping itself as Japan's fuel demand slowly shrinks — cars are getting more efficient and the country is pushing toward cleaner energy. Idemitsu has leaned into petrochemicals, lubricants, and lower-carbon projects to replace some of the fuel business that is fading. That transition is the central question for the company: can it keep earning from oil while building something that lasts after oil demand peaks?
Idemitsu also matters as a shareholder in other energy businesses and has pushed into areas like battery materials and renewable fuels. It pays dividends and returns cash to shareholders, and its balance sheet and refining scale give it room to keep investing through the transition. The business is old, physical, and deeply tied to the Japanese economy — a company that keeps the country's cars moving and its factories supplied, while trying to figure out what comes next.
Saved answer · last researched 15 Nov 2026