EX-Fusion

What EX-Fusion does

EX-Fusion is a Japanese laser fusion company founded in July 2021 as an Osaka University spin-off, developing inertial confinement fusion (ICF) technology for commercial power generation. The company builds full-stack laser fusion reactor capabilities spanning high-output pulsed laser systems, a continuous fuel target supply system (delivering 3-4mm hydrogen isotope ice spheres at 100 m/s velocity and 10Hz repetition rate), and precision laser tracking and control systems achieving 50 micrometer position accuracy on moving targets. Headquartered in Suita, Osaka, with R&D facilities in Hamamatsu and Kyoto, and a wholly-owned Australian subsidiary in Adelaide, EX-Fusion targets demonstration of 1-hour continuous neutron generation by 2027 as a precursor to commercial fusion power plants. In July 2025, the company achieved the world's first 10Hz continuous laser irradiation on simulated fuel targets.

The company's go-to-market operates on two tracks. The core fusion reactor development is pre-commercial and targets eventual licensing/royalties and power generation, supported by Japan's Fusion Energy Innovation Strategy, Keidanren membership, and Co-founder Yoshitaka Mori's leadership of the national Moonshot Goal 10 violet semiconductor laser inertial fusion project. Near-term revenue is generated through laser processing services that leverage fusion-derived optical technology — consulting, custom system construction, component sales, and processing services at the Kyoto Katsura demonstration facility (operational from March 2025 with 5kW SM fiber laser and 5-axis processing stage for CFRP and metals). Customer segments span energy utilities, manufacturing/aerospace firms, research institutions, and emerging space applications (space debris tracking, laser communications via the Australian subsidiary). As of October 2025, the company has raised approximately 6 billion yen cumulative across pre-seed, seed, pre-Series A, Series A, and Series A extension rounds from a syndicate including ANRI, Osaka University Venture Capital, MPower Partners, Mitsubishi UFJ Capital, SMBC Venture Capital, JX Metals, and SBI Shinsei Investment.

Name

EX-Fusion

Legal name

株式会社EX-Fusion

Website

https://ex-fusion.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

EX-Fusion is a Japanese laser fusion startup founded in 2021 as an Osaka University spin-off, developing inertial confinement fusion reactors for clean energy while commercializing near-term laser processing services for energy, manufacturing, aerospace, and space customers.

Ownership category

akta.pro rank

Product category

Laser Fusion Technology

NAICS

Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing (336415), Irradiation Apparatus Manufacturing (334517), Guided Missile and Space Vehicle Manufacturing (336414)

SIC

Optical Instruments & Lenses (3827), Guided Missiles & Space Vehicles & Parts (3760), Motors & Generators (3621)

akta.pro primary industry

Gen IV / Advanced Reactor Systems (SFR, LFR, GFR, MSR, HTGR, Microreactors) (EUAKADAC)

akta.pro secondary industries

Optics & Laser/Light Engine Components (Lenses, Galvos, Laser Modules, UV Engines) (IMAAAIAC), Hybrid Rocket Engines (IMABADAG)

Keywords

• Laser fusion technology
• Inertial confinement fusion
• Nuclear fusion reactor
• Laser processing services
• Fusion energy development

Headquarters

HQ city

Osaka

HQ country

Japan

HQ region

Asia

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales

Revenue model

1. Laser Fusion Reactor Development: Core business focused on developing commercial laser fusion reactors. Revenue will be generated through technology development, licensing, and eventual power generation. The company is building demonstration devices and targeting commercial fusion power plant deployment.
2. Laser Processing Services: Industrial laser processing services including consulting, system construction, and component sales. Services include high-power laser cutting and welding, CFRP processing, optical system design, and proof-of-concept support for manufacturing applications.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

EX-Fusion develops commercial laser-based nuclear fusion reactors using inertial confinement fusion technology, building high-power laser systems, continuous fuel target supply mechanisms, and precision optical control technologies. The company also commercializes the laser processing expertise developed for fusion R&D by offering industrial laser processing services including consulting, custom system construction, and component sales to manufacturers in aerospace, automotive, and materials processing sectors.

Product overview

EX-Fusion operates as a platform-plus-applications company focused on laser fusion reactor development as its core technology. The primary platform consists of high-power laser systems, target supply mechanisms, and precision optical control technologies for inertial confinement fusion. Technology developed for fusion applications is commercialized through laser processing services offered via three modules: consulting/technical services, system construction and component sales, and the Kyoto Katsura demonstration facility. The company also participates in collaborative research clusters (e.g., with Tokyo Institute of Technology on liquid metal devices) and international partnerships for technology development.

Differentiator

Problem solved

Functional benefit

Products and services

• Laser Fusion Reactor Development Development of laser-based inertial confinement fusion reactors for commercial power generation. Includes high-power laser systems, fuel target supply, and precision optical control technologies aimed at commercial fusion power plant deployment.
• Laser Processing Services (レーザー加工事業) Industrial laser processing services leveraging technology developed for laser fusion research. Includes high-power laser cutting, welding, CFRP processing, optical system design, and proof-of-concept support for manufacturing applications in aerospace, automotive, and advanced materials.
• Consulting and Technical Services (コンサルティング・技術提供) Technical consulting services addressing laser processing challenges, providing optimal solutions from technical review through demonstration support for manufacturers needing laser-based production solutions.
• Laser Processing System Construction and Component Sales (加工システム構築・コンポーネント販売) Custom laser processing system construction and component sales including light sources, processing heads, optical systems, and control devices tailored to specific manufacturing customer requirements.

Quantifiable outcome

• 10Hz continuous laser irradiation achieved for fusion reactor development
• +3 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• 名城大学・東京農工大学・核融合科学研究所 (Meijo University, Tokyo University of Agriculture and Technology, National Institute for Fusion Science)coreStrategic or Co-development Partner · 24 February 2026Academic partnership under Moonshot Goal 10 project for violet semiconductor laser inertial fusion module development. Collaborative research consortium working on high-efficiency laser drivers for fusion applications.
• 株式会社ジェイテックコーポレーション (Jtech Corporation)coreStrategic or Co-development Partner · 23 December 2024Technology partnership for next-generation high-performance reflective mirror development. Combines ultra-precision processing, measurement, control, optics, and crystal growth technologies for fusion energy commercialization and precision optics applications.
• 日本経済団体連合会 (Keidanren)minorOthers · 1 November 2024Membership in Japan Business Federation (Keidanren) to collaborate with member companies, leverage Japan's strengths in fusion technology, and contribute to Science to Startup initiatives.
• 東京工業大学 (Tokyo Institute of Technology)coreStrategic or Co-development Partner · 12 October 2023EX-Fusion Liquid Metal Collaborative Research Cluster established for liquid metal blanket development for commercial laser fusion reactors. Joint research on liquid fuel breeding materials, final optical systems, and environmental purification technologies. Duration: October 2023 to September 2026.
• EOS Space Systems (Australia)coreStrategic or Co-development Partner · 8 October 2023Memorandum of Understanding signed to explore cooperation on space debris issues. Integration of EX-Fusion's high-power laser technology into EOS optical ground stations for space debris tracking and removal. Duration: 12 months from last signature.

Scale indicators11 records

Recent moves7 records

Expansion highlights7 records

Direct peers

• Helion Energy: US-based private fusion company pursuing pulsed magnetic/field-reversed configuration approach targeting commercial electricity by 2028 with Microsoft offtake. Closest analog as a privately funded fusion startup targeting near-term commercial power generation with alternative fusion architecture.
• Commonwealth Fusion Systems: MIT-spinout developing a compact tokamak (SPARC) using high-temperature superconducting magnets, with $2B+ raised. Closest peer in scale and ambition among private fusion developers, though pursuing magnetic confinement rather than inertial.
• TAE Technologies: California-based fusion company pursuing field-reversed configuration with neutral beam injection, $1.2B+ raised. Comparable as a deep-tech private fusion developer with multiple funding rounds and a long timeline to commercialization.
• Focused Energy: German/American laser fusion startup pursuing direct-drive inertial confinement fusion, building on NIF ignition results. Most direct ICF peer with comparable physics approach and target of commercial fusion power.
• First Light Fusion: UK-based inertial fusion startup using projectile-driven target compression rather than laser-driven. Comparable as a privately funded ICF company pursuing commercial fusion energy with a unique driver architecture.
• Marvel Fusion: German laser-driven fusion startup pursuing short-pulse laser-driven fusion with nanostructured targets. Closest European laser-fusion peer with comparable short-pulse approach and emerging-player funding profile.

Emerging players

• Xcimer Energy: US-based inertial fusion startup developing a laser-driven inertial confinement fusion system with novel target and chamber design. Early-stage peer pursuing similar ICF commercialization path with significant seed/Series A funding.

Broad incumbents

• Type One Energy: US stellarator fusion developer with $200M+ raised pursuing magnetic confinement fusion. Comparable as a well-funded private fusion startup with university roots and named commercial timeline targets.
• Tokamak Energy: UK-based spherical tokamak fusion developer with high-temperature superconducting magnets, $200M+ raised. Comparable as a private fusion startup targeting commercial deployment with strong government and institutional backing.
• IPG Photonics: Global leader in high-power fiber lasers for industrial applications including materials processing and aerospace. Comparable as a player in high-power laser systems that intersect with EX-Fusion's laser processing services and laser driver technology.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/EX-Fusion-Inc-103471562170540
• LinkedInlinkedin.com/company/ex-fusion

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds6 records

Investors26 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about EX-Fusion