Kyoto Fusioneering

Kyoto Fusioneering

Private
JapanEnergy & Sustainabilityhttps://www.kyotofusioneering.com

Last Round

Debt

Sep 9, 2025

Total Funding Raised

$161.3M

Momentum Score

25 /100

Company Overview

Kyoto Fusioneering is a fusion energy company that develops advanced technologies and systems to facilitate the practical implementation of fusion energy and reduce carbon dioxide emissions.

Sector

Energy & Sustainability

Verticals

Renewable Energy, Advanced Materials, Clean Manufacturing

Business Model

B2B

Customer Profile

Hardware Sales, Government Contracts, Services & Consulting

AI Layer

Non-AI

Keywords

fusion energy engineeringfusion reactor componentsgyrotron systemstritium fuel cycle systemsbreeding blanketsfusion picks and shovelsfusion supply chainplasma heatingfusion plant engineeringtritium processingintegrated testing facilitiesfusion materialsadvanced ceramics

Historical Pricing

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Caplight Momentum Score

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Kyoto Fusioneering Comps

Public and private peers based on sector, stage, and business model.

CompanyStatusEst. ValuationRev Multiple
OpenAIPrivate$86.0B~40x
CoherePrivate$5.0B--
Competitor 1Public$XX.XBXXx
Competitor 2Public$XX.XBXXx

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Kyoto Fusioneering Funding Rounds

Historical fundraising activity

RoundDateAmount RaisedValuationInvestorsSources
DebtSep 9, 2025
Series C ExtensionSep 9, 2025
Series C ExtensionJul 23, 2024
Series C ExtensionApr 11, 2024
Series CMay 17, 2023
Series B
Feb 2, 2022

Key People

Founding team and executive leadership

Kiyoshi Seko

COO, Board Director

Executive Team

Kyoto Fusioneering Investors

Notable investors and investment history

InvestorRounds
JAFCO Group Co., Ltd.Series C Extension, Series B, Series C
Development Bank of JapanSeries B, Series C
Coral CapitalSeries C Extension, Seed, Series B, Series C
Fujikura Ltd.Series C Extension
Mitsubishi UFJ Financial GroupDebt
Kyogin Shining Future Support Fund III for SDGs Investment Limited PartnershipSeries C Extension
K4 VenturesSeries C Extension, Series C

Market signals

Structured signals derived from secondary market and firmographic data.

  • Jan 1, 2026

    Secured National Institute for Fusion Science as a customer.

  • Apr 24, 2025

    Partnering with Kyushu University on the FAST Project for fusion power.

Kyoto Fusioneering Filings

SEC and related filings with document metadata.

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Kyoto Fusioneering Filings

SEC and related filings with document metadata.

Frequently Asked Questions

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Firmographic Details

HeadquartersJapan
Employee Range74
Year Founded2019
Last FundingSep 9, 2025

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