# MiRESSO

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/miresso

- Industry: Chemicals
- Headquarters: Japan
- Website: www.miresso.co.jp
- Total disclosed funding: $29M
- Latest round: Series A (Feb 27, 2026)
- Investors on record: 13

## About

Based in Aomori, Japan, and founded in 2023, MiRESSO Co., Ltd. operates as a provider of mineral resources by using low-temperature purification technology for a stable supply of beryllium for nuclear fusion. The company provides a low-temperature refining technology for beryllium purification. Additionally, the firm also offers technology platform services for mineral resource refining and recycling. In?February 2026,?MiRESSO?raised?JPY 2.4 billion in?series A funding led by?SBI Investment, with participation from Mitsui & Co., Mitsubishi UFJ Capital, Alconix Ventures, MPower Partners, NTT DOCOMO Ventures, Kyoto Capital Partners, ITOCHU Technology Ventures, and Keio Innovation Initiative. The round was part of a larger JPY 4.23 billion series A equity funding. The company plans to use the?February 2026 funding to invest in the construction of its “BETA” pilot plant.

## Funding rounds

- Series A, Feb 27, 2026, $15M — Mitsubishi UFJ Capital, ITOCHU Technology Ventures, SBI Investment, NTT DOCOMO Ventures, Mitsui & Co., Keio Innovation Initiative, Kyoto Capital Partners, MPower Partners, Alconix Ventures
- Series A, Aug 7, 2025, $12M — Genesia Ventures, Spiral Capital
- Seed, Mar 27, 2024, $1.6M — Mitsui Sumitomo Insurance Venture Capital, Global Brain, Genesia Ventures

## Investors

- Mitsui Sumitomo Insurance Venture Capital (https://capitalatlas.ai/funds/mitsui-sumitomo-insurance-venture-capital) — Seed
- Global Brain (https://capitalatlas.ai/funds/global-brain) — Seed
- Genesia Ventures (https://capitalatlas.ai/funds/genesia-ventures) — Seed, Series A
- Spiral Capital (https://capitalatlas.ai/funds/spiral-capital) — Series A
- Mitsubishi UFJ Capital (https://capitalatlas.ai/funds/mitsubishi-ufj-capital) — Series A
- ITOCHU Technology Ventures (https://capitalatlas.ai/funds/itochu-technology-ventures) — Series A
- SBI Investment (https://capitalatlas.ai/funds/sbi-investment) — Series A
- NTT DOCOMO Ventures (https://capitalatlas.ai/funds/ntt-docomo-ventures) — Series A
- Mitsui & Co. — Series A
- Keio Innovation Initiative (https://capitalatlas.ai/funds/keio-innovation-initiative) — Series A
- Kyoto Capital Partners (https://capitalatlas.ai/funds/kyoto-capital-partners) — Series A
- MPower Partners — Series A
- Alconix Ventures (https://capitalatlas.ai/funds/alconix-ventures) — Series A