What Idemitsu Kosan does

Idemitsu Kosan is a Tokyo-headquartered, Tokyo Stock Exchange-listed (TYO:5019) integrated energy company founded in 1911, operating as Japan's second-largest oil refiner with approximately 13% of national refining capacity and a retail network of roughly 6,000 service stations. Its core business spans crude procurement, refining, petrochemicals, lubricants, and retail fuel, serving both individual consumers through its service station channel and industrial customers across manufacturing, transportation, and chemicals. The company employs 10,000+ people globally and runs a ¥1.8 trillion investment program targeting growth in transition-adjacent businesses alongside its traditional refining core.

Underlying Idemitsu's transition strategy are three proprietary technology platforms: (1) sulfide-based solid-state electrolytes, developed over 30 years and now being scaled through a joint pilot plant with Toyota for next-generation EV batteries; (2) chemical recycling technology that converts waste plastics back into petrochemical feedstock, with commercial operations launched in April 2026; and (3) industrial AI/OT systems, deployed via Cognite Atlas AI, to optimize refinery operations and the retail network. Strategic investments in MidOcean Energy (LNG, March 2026) and Quaise Energy (deep geothermal, June 2026) further extend the technology base into upstream gas and next-generation renewables.

Idemitsu's revenue model combines high-volume, low-margin commodity fuel sales through its service stations with B2B contracts in petrochemicals, lubricants, and increasingly LNG and battery materials. The FY2025 baseline of ¥244 billion pre-tax profit and a stated FY2030 target of ¥360 billion imply roughly 47% profit growth, supported by restructuring (the April 2026 polyolefin merger with Mitsui Chemicals and Sumitomo Chemical), capex deployment, and customer expansion into US AI data center gas supply via the November 2025 Overwatch Capital partnership. Customer mix is diversifying from long-tail domestic B2C toward large industrial anchors, creating moderate concentration risk offset by segment breadth.

Name

Idemitsu Kosan

Legal name

Idemitsu Kosan Co., Ltd. (出光興産株式会社)

Website

https://idemitsu.com

Company type

Public

Founded year

1911

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Idemitsu Kosan is Japan's second-largest integrated oil refiner and petrochemical producer, operating roughly 6,000 service stations and 13% of national refining capacity, while expanding into LNG, sulfide solid-state batteries with Toyota, chemical recycling, and US AI data center gas supply.

Ownership category

akta.pro rank

Product category

Petroleum Refining and Energy

NAICS

Petroleum Refineries (32411), Petroleum Refineries (324110), Petrochemical Manufacturing (32511), Petrochemical Manufacturing (325110), Petroleum Lubricating Oil and Grease Manufacturing (324191), Petroleum and Coal Products Manufacturing (324)

SIC

Petroleum Refining (2911), Wholesale-Petroleum Bulk Stations & Terminals (5171), Wholesale-Petroleum & Petroleum Products (No Bulk Stations) (5172), Miscellaneous Products Of Petroleum & Coal (2990)

akta.pro primary industry

Oilfield & Refining Specialty Chemicals (IMAEABAI)

akta.pro secondary industry

Refinery Offsites, Storage & Loading (Tankage, Truck/Rail/Marine Loading) (EUALAGAK)

Keywords

• Petroleum refining
• Fuel oil distribution
• Petrochemical products
• Lubricant manufacturing
• Renewable energy generation

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices7 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Infrastructure, Personnel, Technology or R&D, Marketing or Sales

Revenue model

1. Petroleum Products Sales: Idemitsu's core business involves refining crude oil and selling petroleum products including gasoline, diesel, and fuel oil through approximately 6,000 service stations nationwide. The company operates four major refineries representing 13% of Japan's refining capacity.
2. Petrochemical Products: Production and sale of petrochemical products derived from naphtha and other refinery outputs. Idemitsu has top-scale ethylene production capacity in Japan through integrated refinery-petrochemical operations.
3. Electricity Sales (idemitsuでんき): Idemitsu sells electricity directly to residential and business customers across Japan, leveraging its power generation assets and diversified energy portfolio. Services include S-plan for general households, all-electric plans, and corporate electricity supply.
4. LNG Investment and Trading: Idemitsu invested $500 million in MidOcean Energy for full-scale entry into the LNG sector, aiming to develop LNG projects globally and leverage MidOcean's portfolio of LNG projects across Australia, Canada, and South America.
5. Lubricant Products: Production and sale of engine oils (apollostation oil), gear oils, ATF, and other lubricant products through service stations and direct B2B sales. Product lines include premium synthetic oils for gasoline and diesel engines.
6. Power Generation and Renewable Energy: Idemitsu operates biomass, wind, solar, and natural gas power generation facilities, selling electricity to utilities and directly to consumers. The company also develops geothermal power generation.
7. Specialty Materials (Solid Electrolytes): Production of sulfide solid electrolytes for solid-state batteries in partnership with Toyota, representing a strategic growth area in advanced battery materials.
8. Overseas Oil and Gas Development: Idemitsu operates gas field development projects in Vietnam and natural gas supply operations for data centers in North America, with additional upstream oil and gas assets.

Pricing tiers

Go-to-market motion3 records

Distribution channels7 records

Marketing channels6 records

Core offering

Idemitsu Kosan operates five core business segments: Fuel Oil (crude oil refining across four major refineries representing 13% of Japan's capacity and ~6,000 apollostation service stations), Basic Chemicals (naphtha and ethylene production with top-scale domestic capacity), Functional Materials (lubricating oils, electronic materials, and specialty chemicals), Power and Renewable Energy (biomass, wind, solar, and natural gas generation with retail electricity under idemitsuでんき), and Resources (overseas oil/gas development, geothermal power, coal, and biomass fuels).

Product overview

Idemitsu Kosan operates as a diversified Japanese energy and materials company organized into five core business segments: Fuel Oil (crude refining and ~6,000 service stations), Basic Chemicals (naphtha and petrochemical feedstock with top-scale domestic ethylene capacity), Functional Materials (lubricants, electronic materials, functional pavement, functional chemicals), Power and Renewable Energy (power generation and retail electricity via idemitsuでんき), and Resources (overseas oil/gas development, geothermal, coal, biomass). Key branded offerings include the apollostation retail network with associated apollostation Oil engine lubricant line, idemitsuでんき electricity retail services, and emerging advanced materials for batteries including sulfide solid electrolytes for solid-state batteries and recycled oil via chemical recycling. The company also provides digital services including an SS search locator and My idemitsu portal for integrated service access.

Differentiator

Problem solved

Functional benefit

Brands

• apollostation: Service station brand offering fuel, car maintenance, EV charging, and community services across Japan
• idemitsuでんき (Idemitsu Denki)
• idemitsuでんでん
• apollostation oil

Products and services

• Fuel Oil Crude oil refining across four major refineries in Hokkaido, Chiba, Aichi, and Tokuyama (13% of Japan's refining capacity), supported by a network of oil terminals and approximately 6,000 service stations nationwide. Provides stable supply of gasoline, diesel, kerosene, and fuel oils while transforming refineries into carbon-neutral (CNX) hubs.
• Basic Chemicals Production and sale of petrochemical feedstock including naphtha and ethylene from integrated refinery operations. Idemitsu operates Japan's top-scale ethylene production capacity, serving as raw material for plastics, solvents, and industrial chemicals.
• Functional Materials (lubricants, electronic materials, specialty chemicals) Develops and supplies sustainable materials leveraging proprietary R&D, encompassing lubricating oils, electronic materials, functional pavement materials, functional chemicals, and agrochemicals/functional feed.
• Power and Renewable Energy Operates diverse power generation including biomass, wind, solar, and high-efficiency low-emission natural gas-fired plants, with electricity wholesale and retail sales to utilities, industries, and households.
• Resources (oil, gas, coal, geothermal) Encompasses overseas oil and gas field development (including Vietnam), stable coal supply, biomass fuel development, and domestic geothermal power plant operation and development, leveraging accumulated technical expertise.
• idemitsuでんき (Idemitsu Electricity) Retail electricity service for residential and commercial customers across Japan, offering usage-based discount plans (S Plan, All-electric Plan, Low-voltage Power Plan), EV charging services, and renewable energy options including CO2-free green plus plans.
• apollostation Service Stations Service station brand operating approximately 6,000 stations nationwide, offering fuel sales (gasoline, diesel, kerosene), EV chargers, hydrogen stations, car maintenance, vehicle inspection, car leasing, car sharing, and the apollostation oil engine lubricant product line.
• apollostation Oil Engine Lubricants Engine lubricant product line under the apollostation brand including gasoline engine oils (premium and standard grades in viscosities 0W-8 to 10W-30), diesel engine oils, ATF/CVT gear oils, and motorcycle oils meeting API, SAE, ILSAC, ACEA, and JASO specifications.
• Sulfide Solid Electrolyte Sulfide solid electrolyte materials for all-solid-state lithium-ion batteries, produced at the Chiba pilot plant to support Toyota's mass production of SSB-equipped EVs targeted for 2027-2028. Capacity of several hundred metric tons annually.
• Chemical Recycling (Ichihara Plant) Plastic waste chemical recycling facility at the Ichihara site processing 20,000 tonnes per year of plastic waste to produce approximately 14,000 tonnes per year of recycled oil for use in Idemitsu's refining and petrochemical operations, operated by subsidiary Chemical Recycle Japan (CRJ).
• SS Search Service (Service Station Locator) Online service station locator tool enabling users to search approximately 6,000 Idemitsu service stations across Japan by current location, area, brand (apollostation, apolloONE), services, and payment methods.

Quantifiable outcome

• Projected pre-tax profit of 360 billion yen by fiscal 2030, up from 244 billion yen in fiscal 2025
• +3 more outcomes

Named customers5 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eight partnerships are on record, tiered emerging and core.

• Quaise EnergyemergingStrategic or Co-development Partner · 25 June 2026Idemitsu announced a strategic investment in Quaise Energy, a Texas-based company developing millimeter-wave drilling technology capable of penetrating depths of up to 20 kilometers to access geothermal zones reaching 300-500 degrees Celsius. The collaboration combines Idemitsu's decades of geothermal experience dating back to 1973 with Quaise's innovative drilling techniques to enhance energy security.
• KG MotorsemergingGTM or Marketing Partner · 17 February 2026Idemitsu partnered with KG Motors, a Japanese startup known for its affordable city EV MiBot, to collaborate on e-mobility services at Idemitsu stations beginning April 2026. The partnership includes sales support, infrastructure development, and EV service expansion in Tokyo and Hiroshima pilot programs.
• Sony, Mitsubishi Corporation, and 12 other companiesemergingStrategic or Co-development Partner · 6 February 2026Idemitsu participates in the world's first global supply chain for renewable plastics established by Sony and Mitsubishi Corporation, involving 14 companies across five countries using a mass balance approach to track renewable content across production stages for Sony's audio-visual products.
• Graphinex, Marubeni, NSCcoreStrategic or Co-development Partner · 4 February 2026Idemitsu partnered with Australia's Graphinex, trading house Marubeni, and chemicals processor NSC to develop a Japan-Australia supply chain for natural graphite-based anode materials. The four companies will use Graphinex's high-grade graphite resources in Queensland to build an integrated supply chain targeting 14,000 metric tons per year of anode material intermediates.
• Toyota Motor CorporationcoreStrategic or Co-development Partner · 29 January 2026Idemitsu and Toyota have a 13-year partnership to develop and produce sulfide solid electrolytes for all-solid-state batteries. Idemitsu began construction of a large-scale pilot plant at its Chiba facility on January 29, 2026, with planned annual capacity of several hundred metric tons, supporting Toyota's target of launching EVs with all-solid-state batteries in 2027-2028. Idemitsu also partners with Sumitomo Metal Mining for cathode materials supply.
• Overwatch CapitalemergingStrategic or Co-development Partner · 20 November 2025Idemitsu formed a strategic partnership with Overwatch Capital to develop 1 GW of energy-resilient AI data centers across ten U.S. states. Idemitsu will supply natural gas to on-site power generation systems, with projects starting in 2026 in Texas, Ohio, and other states.
• Source Energy CompanyemergingStrategic or Co-development Partner · 6 November 2025Idemitsu Kosan and Source Energy Company announced a strategic collaboration to develop next-generation solar array products for the space market.
• Mitsubishi Chemical, Mitsui Chemicals, Sumitomo ChemicalcoreStrategic or Co-development PartnerIn September 2025, Mitsui Chemicals, Sumitomo Chemical, and Idemitsu Kosan announced plans to merge their polyolefin businesses by April 2026, creating an entity with combined sales of approximately $2.6 billion and annual production capacity of 1.59 million metric tons of polypropylene and 720,000 metric tons of polyethylene, holding roughly 30% of Japan's polyolefin market.

Scale indicators11 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Taiyo Oil Company: Japanese privately held refiner with integrated petroleum refining, lubricants, and petrochemicals; smaller than Idemitsu but operates with a similar domestic-focused refining model and specialty chemicals portfolio.
• ENEOS Corporation: Japan's largest oil refiner and Idemitsu's primary domestic competitor, operating a similarly integrated downstream business including refineries, service stations (ENEOS, Jomo), lubricants, petrochemicals, and renewable energy; the closest like-for-like comparison in Japanese refining scale.
• Mitsui Chemicals: Japanese petrochemical major also joining the polyolefin merger with Idemitsu; produces ethylene, polyolefins, and specialty chemicals with overlapping petrochemical feedstock supply relationships to Idemitsu's refineries.
• Cosmo Energy Holdings: Japanese petroleum refiner and operator of the Cosmo Oil service station brand, with refineries, petrochemical operations, and renewable energy initiatives; comparable in scale and integrated downstream strategy to Idemitsu.
• Sumitomo Chemical: Major Japanese petrochemical producer that is Idemitsu's partner in the announced polyolefin business merger (April 2026); operates petrochemical plants and specialty chemicals closely aligned with Idemitsu's basic chemicals segment.
• Showa Shell Sekiyu (now ENEOS): Pre-merger Japanese refiner with service station (Shell) brand; merged into ENEOS in 2019. Historically a direct competitor to Idemitsu in retail fuel marketing and lubricants, useful as a historical comparison point for Japanese refining consolidation.

Broad incumbents

• Idemitsu's broad incumbents: Shell, BP, TotalEnergies, ExxonMobil, Chevron: Global integrated oil majors offering comparable petroleum refining, petrochemicals, LNG, lubricants, and energy transition businesses at much larger scale; useful benchmarks for diversification strategy and energy-transition capital allocation.

Emerging players

• Idemitsu's advanced-materials rivals: Toyota Industries, Panasonic Energy: Japanese battery and materials players (e.g., Panasonic Energy as a major lithium-ion battery manufacturer, Sumitomo Metal Mining as Idemitsu's cathode partner) are emerging comparables in the advanced battery materials space Idemitsu is entering via sulfide electrolytes and graphite anodes.

Others

• Idemitsu's LNG partner comparable: MidOcean Energy / EIG: EIG-managed LNG platform in which Idemitsu invested $500M; operates LNG Canada, Gorgon, Pluto, QCLNG, and Peru LNG. As Idemitsu's LNG vehicle, MidOcean is an enabling partner rather than a competitor but provides read-throughs to global LNG economics.

Regional players

• Idemitsu's refiner-replacement partners: Mitsui Chemicals, Sumitomo Chemical: Mitsui Chemicals and Sumitomo Chemical are co-mergers in the polyolefin venture; they serve as both peers and partners in Japanese petrochemicals and provide a regional comparison for downstream petrochemical integration.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/idemitsukosan

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A2 records

Investments11 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Idemitsu Kosan