# Idemitsu Americas Holdings Corporation

> Idemitsu Americas Holdings Corporation is a VC fund backing Energy. See 5 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Houston, United States
- Total investments: 5
- Last investment: Jul 2026
- Lead investor: 20%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/idemitsu-americas-holdings/about/
- Website: https://idemitsuamericas.com

Idemitsu Americas Holdings Corporation (IAH) is a wholly owned subsidiary of Idemitsu Kosan Co., Ltd., headquartered in San Jose, California. Established in 2020, IAH drives the group’s business development, innovation, and strategy in the United States, Mexico, and Brazil, with a focus on energy transition, sustainability, and next-generationtechnologies.

## Contacts

5 contacts available for Idemitsu Americas Holdings Corporation. Shizune tracks 1 team members at Idemitsu Americas Holdings Corporation. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/idemitsu-americas-holdings-corporation?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Energy | 1 | 20% |
| Analytics | 1 | 20% |
| Industrial | 1 | 20% |
| Clean Energy | 1 | 20% |
| Sustainability | 1 | 20% |

9 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 20% |
| Series A | 1 | 20% |
| Series B | 1 | 20% |
| Debt Financing | 1 | 20% |
| Corporate Round | 1 | 20% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 2 | 40% |
| Germany | 1 | 20% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Keitaro Sugihara | COO and Head of Training; President & CEO | 0 | — |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Quaise Energy | Quaise is an energy company that is developing and commercializing novel millimeter-wave drilling systems to harness geothermal energy around the globe, overcoming the geographic constraints limiting this energy source today. The company was founded in 2018 and is based in Cambridge, Massachusetts. |  | Debt Financing | Jul 07, 2026 |  |
| Quaise Energy | Quaise is an energy company that is developing and commercializing novel millimeter-wave drilling systems to harness geothermal energy around the globe, overcoming the geographic constraints limiting this energy source today. The company was founded in 2018 and is based in Cambridge, Massachusetts. | $134.1M | Series B | Jul 07, 2026 |  |
| Quaise Energy | Quaise is an energy company that is developing and commercializing novel millimeter-wave drilling systems to harness geothermal energy around the globe, overcoming the geographic constraints limiting this energy source today. The company was founded in 2018 and is based in Cambridge, Massachusetts. |  | Corporate Round | Jun 25, 2026 |  |
| Carbonfuture | Carbonfuture is the Trust Infrastructure for durable carbon removal. Today, the Trust Infrastructure consists of two products that seamlessly connect the entire carbon removal lifecycle: Carbonfuture MRV+, the most comprehensive MRV solution for durable CDR, and Carbonfuture Marketplace, the leading marketplace for durable CDR. At Carbonfuture, webuild trust throughout the carbon removal journey with our rigorous, data-driven approach, ensuring unmatched quality and reliability of carbon removal. We empower suppliers by providing the essential project support and finance needed to transform their carbon removal projects into fully certified carbon credits. For corporate buyers, we offer access to portfolios of carbon removal credits adhering to the highest quality standards and provide visibility at each step of the carbon removal lifecycle. We work with some of the world's most ambitious climate leaders such as Microsoft, Swiss Re, and the World Economic Forum First Movers Coalition. For more information, please visit www.carbonfuture.earth |  | Series A | Dec 19, 2025 |  |
| Vycarb | Vycarb is a Brooklyn-based firm that enables decentralized carbon removal through real-time, autonomous, and direct detection of CO2 in water. | $5M | Seed | Oct 06, 2025 |  |

5 of 5 investments shown.

## Co-investors
- JERA Ventures — VC Fund, 2 deals together
- [Safar Partners](https://shizune.co/investors/profile/safar-partners-7ab4) — VC Fund, 2 deals together
- [FIGR Ventures](https://shizune.co/investors/profile/figr-ventures) — VC Fund, 1 deal together
- [Founders Factory](https://shizune.co/investors/profile/founders-factory) — VC Fund, 1 deal together
- [Gigascale Capital](https://shizune.co/investors/profile/gigascale-capital) — VC Fund, 1 deal together
- [Hatch Blue Ltd](https://shizune.co/investors/profile/hatch-blue-ltd) — VC Fund, 1 deal together

## Similar investors

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- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Idemitsu Americas Holdings Corporation invest in?

Idemitsu Americas Holdings Corporation invests primarily in Energy, Analytics and Industrial startups, most often at Seed and Series A stage. Most of the 5 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Idemitsu Americas Holdings Corporation?

Public channels for Idemitsu Americas Holdings Corporation include LinkedIn and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at Idemitsu Americas Holdings Corporation?

The team at Idemitsu Americas Holdings Corporation includes Keitaro Sugihara (COO and Head of Training; President & CEO). The Team section lists each member with their title, investment count and links.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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