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Based in Osaka, Japan, EX-Fusion is a clean energy startup developing laser-powered nuclear fusion reactors to generate safe electricity by irradiating deuterium and tritium with high-output lasers. The company focuses on commercializing reactor technology originating from Osaka University, targeting initial technical demonstrations by 2029 and a commercial prototype reactor by 2035 capable of executing ten fusion reactions per second. Beyond core energy generation, the enterprise also explores alternative industrial applications for its high-repetition-rate optical control systems across the manufacturing, healthcare, photonics, and space exploration sectors. The venture-backed firm has raised approximately $40 million in total equity funding, including a recent $18 million round and a $13 million seed round, with financial backing from lead investors ANRI and Osaka University Venture Capital. EX-Fusion was founded in 2022 by Kazuki Matsuo, Shinsuke Fujioka, and Yoshitaka Mori.
EX-Fusion has raised $16.1M across 3 funding rounds.
EX-Fusion has raised $16.1M in total across 3 funding rounds.
EX-Fusion has raised $16.1M across 3 funding rounds. Most recently, it raised $2.6M Series A Extension in October 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Oct 14, 2025 | $2.6M Series A Plus | — | JX Nippon Mining & Metals, Persol Venture Partners | Announced |
| Jul 6, 2023 | $12.5M Seed | — | ANRI, Delight Ventures, Germination Fund, Mitsubishi UFJ Capital, Mitsui Sumitomo Insurance Venture Capital, Nikon SBI Innovation Fund, Nissay Capital, Osaka Shoko Shinkin Bank, Shizuoka Capital, SMBC Venture Capital | Announced |
| Apr 18, 2022 | $1M Pre Seed | Masahiro Sameshima | Osaka University Venture Capital | Announced |
EX-Fusion has raised $16.1M in total across 3 funding rounds.
EX-Fusion's investors include JX Nippon Mining & Metals, PERSOL VENTURE PARTNERS, ANRI, Delight Ventures, Germination Fund, Mitsubishi UFJ Capital, Mitsui Sumitomo Insurance Venture Capital, Nikon-SBI Innovation Fund, Nissay Capital, Osaka Shoko Shinkin Bank, Shizuoka Capital, SMBC Venture Capital.
