MiRESSO
Bring out the potential of mineral resources and connect a bright future to the next generation
Misawa, Japan · Founded 2023 · $31.6M raised
- Headquarters
- Misawa
- Employees
- 1–10
- Founded
- 2023
- Business Model
- B2B
- Website
- miresso.co.jp
- Total Funding
- $31.6M
- Last Round
- $17.9M Series AFeb 2026
- Rounds
- 3
About
MiRESSO Co., Ltd. is a Japanese fusion startup spun out of the National Institutes for Quantum Science and Technology (QST), focused on securing a stable and cost-competitive supply of beryllium — a rare mineral critical to nuclear fusion reactors. Founded in May 2023 by Dr. Masaru Nakamichi, a former QST fusion blanket engineer, the company is developing a novel low-cost beryllium refining process to enable commercial fusion energy. MiRESSO has raised over JPY 6.68 billion in Series A financing and is backed by investors including Mitsui and MPower Partners. It holds QST certification and is headquartered in Misawa, Aomori, Japan, near the Rokkasho Research Institute.
Summary
MiRESSO is a Climate Tech company based in Misawa, Japan, founded in 2023. It has raised $31.6M in total across 3 rounds, most recently a $17.9M Series A round in Feb 2026. Investors include Spiral Ventures, Genesia Ventures and SBI Investment.
Tech & App Stack
4 technologies & apps tracked
Every product and vendor across these categories, with where each signal came from.
Create a free account with 25 free credits every month, no card needed, to unlock the full tech & app stack, funding history, and valuations.
Funding History
Feb 2026
Sign up to see all 3 rounds
Seed through Series A — per-round amounts, valuations, and who invested in each round.
Investors
Similar Companies
Sempra Infrastructure develops, builds, operates, and invests in infrastructure serving customers...
Green steel company using hydrogen and renewable electricity to decarbonize steel production. For...
Self-driving cars.
AI infrastructure company building renewable-powered data centers and cloud compute optimized for...
EnBW Energie Baden-Württemberg AG is one of Germany's largest integrated energy companies, develo...
Generate is a North American energy platform delivering reliable, affordable, lower-carbon power ...
Your company? Embed this profile
Add the live badge to your site — it stays current as your funding data updates.
<a href="https://indexed.vc/companies/miresso"><img src="https://indexed.vc/api/badge/company/miresso" alt="MiRESSO on Indexed.vc" width="260" height="76" /></a>