# Kyoto Fusioneering

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/kyoto-fusioneering

- Industry: Power & Utilities
- Headquarters: Tokyo, Japan
- Website: www.kyotofusioneering.com
- Total disclosed funding: $222M
- Latest round: Series D (Oct 1, 2026)
- Investors on record: 37

## About

Founded in 2019 and based in Tokyo, Japan, Kyoto Fusioneering Ltd., a company that focuses on the development, design, and commercialization of essential technologies and engineering solutions necessary for fusion energy power plants such as systems for plasma heating, fusion fuel cycles, and thermal cycle systems for fusion reactors. The company was co-founded by Konishi Tetsuyuki (CEO), Richard Pearson, Shutaro Takeda, and Akira Nagao, with the objective of global commercialization of fusion energy. In August 2026, Kyoto Fusioneering Ltd. raised JPY 16.72 billion in series D funding from IMM Investment, SiteGround Capital Ltd., GX Acceleration Agency, Development Bank of Japan, East Japan Railway, Minerva Growth Partners, Inc., SMBC Venture Capital, Kyoto Capital Partners, JIC Venture Growth Investments, Daiwa Corporate Investment, DBJ Capital and MUFG Bank, and a venture debt from Sumitomo Mitsui Banking Corporation, Bank of Kyoto, Sumitomo Mitsui Trust Bank and Mizuho Bank. The round was part of a larger JPY 25.72 billion series D and debt funding.
Kyoto Fusioneering offers high-performance engineering solutions, mainly fusion modules, to private companies and research institutes. The company manufactures nuclear fusion products, including plasma heating devices, heat extraction blankets, high-performance heat exchangers, and hydrogen isotope transfer pumps, for research and development institutions and companies all over the world.
The company plans to use the August 2026 funding for fusion technology development, UNITY™ program expansion, manufacturing scale-up, and global business growth.

## Funding rounds

- Series D, Oct 1, 2026 — IMM Investment, Doosan Corporation, NCB Venture Capital, Nanto Capital Partners, Ignition Point Venture Partners, POSCO Holdings, Posco International, GS Engineering & Construction
- Series D, Aug 24, 2026, $105M — MUFG Bank, Daiwa Corporate Investment, Development Bank of Japan, SMBC Venture Capital, IMM Investment, DBJ Capital, Kyoto Capital Partners, Minerva Growth Partners, JIC Venture Growth Investments, East Japan Railway, GX Acceleration Agency
- Series C, Sep 9, 2025, $9.8M — Sumitomo Mitsui Trust Bank, Global Brain, JERA Ventures
- Series C, Jul 23, 2024, $6.8M — Marubeni, In-Q-Tel, NICHICON CORPORATION
- Series C, Apr 11, 2024, $10M — Fujikura Ltd., Global Brain, Kyoto Capital Partners
- Series C, May 17, 2023, $76M — Mitsui & Co. – Corporate Development Business Unit, JAFCO Group, Electric Power Development, Sumitomo Mitsui Trust Investment, Mitsubishi UFJ Capital, SMBC Venture Capital, Global Brain, DBJ Capital, Mitsubishi, K4 Ventures, Coral Capital, INPEX Corporation, JIC Venture Growth Investments, MOL PLUS, Marunouchi Innovation Partners
- Series B, Feb 2, 2022, $12M — Daiwa Corporate Investment, JAFCO Group, DBJ Capital, Kyoto University Innovation Capital, Coral Capital, JIC Venture Growth Investments
- Seed, Jan 18, 2021, $1.1M — Coral Capital
- Seed, Jan 31, 2020, $0.7M — Kyoto University Innovation Capital

## Investors

- Kyoto University Innovation Capital (https://capitalatlas.ai/funds/kyoto-university-innovation-capital) — Seed, Series B
- Coral Capital — Seed, Series B, Series C
- Daiwa Corporate Investment (https://capitalatlas.ai/funds/daiwa-corporate-investment) — Series B, Series D
- JAFCO Group (https://capitalatlas.ai/funds/jafco-group) — Series B, Series C
- DBJ Capital (https://capitalatlas.ai/funds/dbj-capital) — Series B, Series C, Series D
- JIC Venture Growth Investments (https://capitalatlas.ai/funds/jic-venture-growth-investments) — Series B, Series C, Series D
- Mitsui & Co. – Corporate Development Business Unit — Series C
- Electric Power Development — Series C
- Sumitomo Mitsui Trust Investment (https://capitalatlas.ai/funds/sumitomo-mitsui-trust-investment) — Series C
- Mitsubishi UFJ Capital (https://capitalatlas.ai/funds/mitsubishi-ufj-capital) — Series C
- SMBC Venture Capital (https://capitalatlas.ai/funds/smbc-venture-capital) — Series C, Series D
- Global Brain (https://capitalatlas.ai/funds/global-brain) — Series C
- Mitsubishi — Series C
- K4 Ventures (https://capitalatlas.ai/funds/k4-ventures) — Series C
- INPEX Corporation — Series C
- MOL PLUS — Series C
- Marunouchi Innovation Partners (https://capitalatlas.ai/funds/marunouchi-innovation-partners) — Series C
- Fujikura Ltd. — Series C
- Kyoto Capital Partners (https://capitalatlas.ai/funds/kyoto-capital-partners) — Series C, Series D
- Marubeni — Series C
- In-Q-Tel (https://capitalatlas.ai/funds/in-q-tel) — Series C
- NICHICON CORPORATION — Series C
- Sumitomo Mitsui Trust Bank — Series C
- JERA Ventures — Series C
- MUFG Bank — Series D
- Development Bank of Japan (https://capitalatlas.ai/funds/development-bank-of-japan) — Series D
- IMM Investment (https://capitalatlas.ai/funds/imm-investment) — Series D
- Minerva Growth Partners (https://capitalatlas.ai/funds/minerva-growth-partners) — Series D
- East Japan Railway — Series D
- GX Acceleration Agency — Series D
- Doosan Corporation — Series D
- NCB Venture Capital (https://capitalatlas.ai/funds/ncb-venture-capital) — Series D
- Nanto Capital Partners (https://capitalatlas.ai/funds/nanto-capital-partners) — Series D
- Ignition Point Venture Partners (https://capitalatlas.ai/funds/ignition-point-venture-partners) — Series D
- POSCO Holdings — Series D
- Posco International — Series D
- GS Engineering & Construction — Series D