Kyoto Fusioneering
Kyoto Fusioneering is a climate tech company in Tokyo, Japan, founded in 2019. It has raised $281.7M across 6 rounds, most recently a $105.0M Series D in August 2026.
Developing fusion technology to drive a new energy industry
- Headquarters
- Tokyo, Tokyo
- Employees
- 201–500
- Founded
- 2019
- Business Model
- B2B
- Website
- kyotofusioneering.com
- Total Funding
- $281.7M
- Last Round
- $105.0M Series DAug 2026
- Rounds
- 6
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 6 funding rounds and 6 investors for this company. The full record is or through the API.
About
Kyoto Fusioneering (KF) is the world's premier fusion technology and integrated systems provider, founded in 2019 and rooted in decades of fusion R&D from Kyoto University. The company develops critical-path engineering solutions — including tritium breeding blankets, plasma-facing components, and heat extraction systems — for commercial fusion power plants worldwide. As the largest fusion company to emerge from Japan, KF partners with leading fusion developers and national laboratories to accelerate the timeline to commercial fusion energy.
Summary
It lists 201–500 employees. It has raised $281.7M in total across 6 rounds, most recently a $105.0M Series D round in Aug 2026. Investors include JIC Venture Growth Investments, Kyocera Venture Innovation Fund No. 1 (Global Brain) and JERA.
Tech & App Stack
6 technologies & apps tracked
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Funding History
Aug 2026
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Funding: Series B through Series D. Amounts, valuations, and investors where available.
Investors
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