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Kyoto Fusioneering
Fusion plant engineering: gyrotrons, blankets, and fuel cycle (UNITY)
About Kyoto Fusioneering
Kyoto Fusioneering Co., Ltd. (京都フュージョニアリング) is a Kyoto University–originated fusion plant engineering company founded October 1, 2019. Rather than competing on plasma confinement concepts, it supplies the plant “engine” systems every commercial fusion plant needs: gyrotron plasma heating, breeding blankets and heat extraction for power generation, and tritium fuel-cycle systems. Its UNITY program integrates these technologies—UNITY-1 (Kyoto) for blanket/thermal cycle, UNITY-2 (with Canadian Nuclear Laboratories) for fuel cycle, and UNITY-3 (with US DOE/ORNL) for breeding blanket demo. Tokyo HQ plus Kyoto research center; UK subsidiary. Selected for Tokyo SusHi Tech Global Growth Acceleration Program Phase 1 (2026).
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2019
- Headquarters
- Tokyo, Japan
- Employees
- 73
- Open positions
- None listed
- Dealroom signal
- 82.5/100
- Industry
- Energy
- Sub-industry
- Clean Energy
- Sector
- Energy, Spinout, 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
Open roles
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| DEBTDebt | Sep 2025 | $3.8M | — | Sumitomo Mitsui Banking · Mitsubishi UFJ Financial Group · Bank of Kyoto · Japan Bank for International Cooperation | ↗ |
| SERIES COther financing | Sep 2025 | $3.9M | $395M | Global Brain Corporation · 31Ventures · JERA · Sumitomo Mitsui Trust Bank | ↗ |
Growth signals
Latest recorded traffic for Kyoto Fusioneering is 18K monthly website visits, up 63.6% over the last three months. Kyoto Fusioneering's team grew 2.8% over the past year.
Open positions
Similar companies
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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.
Seed10 investors entered at this stage
Kyoto University Innovation Capital
Coral Capital
Sumitomo Mitsui Banking- JFJGC MIRAI Innovation Fund
DBJ Capital
JAFCO
Mitsubishi UFJ Financial Group
Daiwa Corporate Investment
JIC Venture Growth Investments
Bank of Kyoto
Series B and later24 investors entered at this stage
MUFG Union Bank
SMBC Venture Capital
Mitsui Global Investment
K4 Ventures
Sumitomo Mitsui Trust
Inpex
Mitsubishi UFJ Capital
Global Brain Corporation
Mitsubishi
J-POWER
Jgc
Kansai Electric Power
MOL PLUS
Fujikura
31Ventures
Kyoto Capital Partners
Marubeni
In-Q-Tel
Nichicon
Japan Bank for International Cooperation
Japan Finance
JERA
Sumitomo Mitsui Trust Bank
Kyocera Venture
Other known investors2 additional known investors
J-Startup
Kyoto University
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Kyoto Fusioneering 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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