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Kyoto Fusioneering

Tokyo, Japan · Founded 2019 · Privately Held (backing)

Developer of a fusion technology intended to offer technical assistance to accelerate the practical realization of fusion energy. Kyoto Fusioneering is based in Tokyo, Japan and was founded in 2019. Its last reported valuation was $508 million in Apr 2025. It has raised $191 million.

Last reported valuation
$508.1M
Oct 2026
Priced at
—
Total raised
$191.3M
Last round
—

Kyoto Fusioneering key facts

as of Oct 2026
  • Developer of a fusion technology intended to offer technical assistance to accelerate the practical realization of fusion energy.
  • Kyoto Fusioneering is valued at approximately $508.1M as of Oct 2026 (last reported valuation).
  • It has raised $191.3M; the latest was Later Stage VC ($64.5M) in Apr 2025.
  • Notable investors include Mitsubishi UFJ Capital, Global Brain, SMBC Venture Capital, In-Q-Tel, JIC Venture Growth Investments — 29 tracked in total.
  • Status: Privately Held (backing).
Last reported valuation
LOW confidence
$508.1M

Kyoto Fusioneering's last reported valuation, Apr 2025. Nothing priced has surfaced since.

set by last reported valuationas of Oct 2026question about this number?
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Kyoto Fusioneering funding rounds

No rounds on record

No funding rounds for Kyoto Fusioneering are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.

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Kyoto Fusioneering valuation

Kyoto Fusioneering's last reported valuation was $508 million in Apr 2025. No priced round, secondary trade or fund mark has surfaced since.

Kyoto Fusioneering investors

29 investors are on record for Kyoto Fusioneering, including Mitsubishi UFJ Capital, Global Brain, SMBC Venture Capital and In-Q-Tel. By type, the record holds 7 venture capital firms and 1 asset manager.

About Kyoto Fusioneering

Developer of a fusion technology intended to offer technical assistance to accelerate the practical realization of fusion energy. The company's technology offers liquid metal, molten salt, tritium treatment systems, high-frequency microwave gyrotron, fusion energy, and exhaust systems, and offers advanced technologies for commercial fusion reactors, including gyrotron systems, tritium fuel cycle technologies, and breeding blankets for tritium production and power generation, enabling companies to eliminate carbon dioxide emissions.

Sector
Energy
HQ
Tokyo, Japan
Founded
2019
Employees
130
Ownership
Privately Held (backing)

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