Idemitsu Kosan
Corporate VCSeed–Growth
Also known as 出光興産株式会社
Investment thesis
Idemitsu Kosan is a Japanese energy company that refines and supplies fuels through a network of refineries, oil depots, and around 6,000 service stations, and also operates in petrochemicals, functional materials, renewable and thermal power generation, and resource development.
Source: firm website, verified Aug 3, 2026.
What they invest in
from 4 of 4 portfolio companiesCleantech ×4Energy ×4Deep Tech ×2Climate Tech ×1Logistics & Supply Chain ×1
HQs:Australia×1Japan×1United States×1
Investments · 4 tracked
founders shown can be your intro pathBy year:2026 · 22024 · 13 dated
Gyxis is a gas and energy company that handles liquefied petroleum gas (LPG) trading, distribution, and logistics across Japan and globally.
CleantechEnergyLogistics & Supply Chain
Co-investorsSumitomo Corporation
Jet Zero develops sustainable aviation fuel (SAF) projects in Australia to support regional economies, fuel security, and decarbonization in the aviation and transport sectors.
CleantechClimate TechEnergySydney, AU
Co-investorsDragonfly Enviro CapitalAirbus
Quaise Energy develops ultra-deep geothermal drilling using gyrotron-powered millimeter-wave technology to reach depths up to 20 km and temperatures up to 500°C, aiming to build superhot geothermal power plants.
CleantechDeep TechEnergy
Carlos Araque(Founder)in
Co-investorsHelium-3 VenturesThe Engine VenturesJERAPrelude Ventures
Quaise Energy develops superhot geothermal drilling technology using millimeter-wave powered drilling to access deep geothermal energy sources at unprecedented depths and temperatures for large-scale clean power generation globally.
CleantechDeep TechEnergyHouston, US
Carlos Araque(Executive Officer, Director)inMatt Houde(Founder)in
BoardColleen Calhoun(Director)inVinod Khosla(Director)William Restrepo(Director)Frohman Anderson(Director)
Co-investorsCollaborative FundFine Structures VenturesHelium-3 VenturesPrelude VenturesTechEnergy VenturesXplorer Capital+5 more
Portfolio news
latest coverage across their companies
Jet Zero Australia · industryqld.com.au · Sep 6, 2026
Quaise · energy.mit.edu · Sep 3, 2026
Frequently asked questions
- What stage does Idemitsu Kosan invest at?
- Idemitsu Kosan invests at the Seed, Series A, Series B, Series C, Growth stages.
- What sectors does Idemitsu Kosan focus on?
- Idemitsu Kosan focuses on Sector Agnostic.
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