H
Helical Fusion
Developing steady-state helical fusion reactors.
About Helical Fusion
Helical Fusion is a pioneering startup based in Japan, dedicated to developing a fusion reactor using a unique helical magnetic confinement method. This method involves using superconducting helical coils arranged in a double helix structure, similar to DNA, to stably confine high-temperature plasmas. This innovative approach sets Helical Fusion apart as the only company in the world focusing on this specific technique for achieving nuclear fusion.
The company operates in the advanced energy sector, targeting a market that includes governments, research institutions, and large-scale energy providers. These clients are typically looking for sustainable and long-term energy solutions to address both energy needs and environmental concerns.
Helical Fusion's business model revolves around the design and development of fusion reactors, as well as the provision of elemental technologies essential for fusion energy. The company aims to monetize its innovations through partnerships, licensing agreements, and potentially selling or leasing its reactors and technology to energy providers and other stakeholders in the energy sector.
Revenue is generated by offering cutting-edge fusion technology solutions that promise to revolutionize the energy landscape by providing a virtually limitless and clean energy source. This positions Helical Fusion as a key player in the quest for sustainable energy, addressing global challenges related to energy security and environmental sustainability.
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2021
- Headquarters
- Tokyo, Japan
- Employees
- 20
- Open positions
- None listed
- Dealroom signal
- 81.6/100
- Industry
- Energy
- Sector
- Energy, Sustainable Development Goals, Nuclear Fusion, Climate Tech, NIF defense security and resilience, NIF Energy Security and Climate Change, DT and LS, science-based
- Technology
- Hardware, Deep Tech
- Business model
- Manufacturing
- Client focus
- b2b
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES BOther financing | Apr 2026 | $21M | $83M | Nichias · Konoike Transport · Mitani Sangyo · Hasetora Spinning | ↗ |
| DEBTDebt | Dec 2025 | $0 | — | Undisclosed | ↗ |
Growth signals
Latest recorded traffic for Helical Fusion is 13K monthly website visits, up 49.4% over the last three months. Helical Fusion's team grew 5.3% over the past year.
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|---|---|---|---|---|---|
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Pacific FusionHigh-gain pulsed magnetic nuclear fusion system |
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Marathon FusionBuilding fuel processing technology to make fusion power plants robust, practical and widespread |
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ZC InstituteQuantum spacetime distortion for clean nuclear fusion |
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Gauss FusionIndustrial-scale stellarator fusion power plant development |
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Proxima FusionDesigning optimised stellarator fusion reactors |
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed2 investors entered at this stage
SBI Investment
Japan Ministry of Education
Series A7 investors entered at this stage
- TCToyoda Gosei Company
Keio Innovation Initiative
Ecrowd
Nichias
Konoike Transport
Mitani Sangyo- HSHasetora Spinning
Other known investors1 additional known investor
Global Hypergrowth Tokyo
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Helical Fusion on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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