Miresso
- Company typePrivate
- Founded2023
- HeadquartersMisawa, Japan
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
Miresso firmographics
Firmographics- Name
- Miresso
- Legal name
- 株式会社MiRESSO
- Website
- https://miresso.co.jp
- Company type
- Private
- Founded year
- 2023
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Ownership category
- akta.pro rank
Miresso industry classification
Industry- Product category
- Fusion Energy Materials Manufacturing
- NAICS
- Other Basic Inorganic Chemical Manufacturing (325180)
- SIC
- Primary Smelting & Refining Of Nonferrous Metals (3330), Industrial Inorganic Chemicals (2810)
- akta.pro primary industry
- Industrial Isotope Production & Supply (Co-60, Ir-192, Cs-137, Am-241, etc.) (EUAKAIAB)
Keywords
Where Miresso is headquartered
LocationHeadquarters
- HQ city
- Misawa
- HQ country
- Japan
- HQ region
- Asia
Offices2 records
Markets served
Miresso business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Infrastructure, Personnel, Supply Chain, Marketing or Sales, Operations
Revenue model
- Beryllium Manufacturing and Sales Business: Manufacturing and selling beryllium produced using proprietary low-temperature refining technology. Beryllium is sold as neutron multiplier material for fusion energy reactors, and also for existing applications in aerospace, medical imaging systems, and electronic components. Revenue will commence upon pilot plant BETA reaching commercial production in FY2027.
- Technology Platform Business: Joint development, consulting, and technology licensing services utilizing low-temperature refining technology for mineral resource refining and recycling applications beyond beryllium. Services include feasibility verification, process proposal, equipment introduction, and technology licensing for rare earth, lithium, ceramics, and other materials requiring high-temperature processing.
- Joint Development and Consulting: Customized R&D collaboration with clients on mineral resource refining challenges, including recycling applications. Technology platform approach offering process development tailored to specific materials and client requirements.
Go-to-market motion2 records
Distribution channels1 record
Marketing channels4 records
Miresso product offering
Product offeringCore offering
MiRESSO manufactures and sells beryllium for nuclear fusion reactors using proprietary low-temperature refining technology (300°C vs. conventional 2,000°C) employing alkaline reagents and microwave heating. The company also operates a Technology Platform Business offering joint development, consulting, and licensing of the refining process for rare earths, lithium, ceramics, and other mineral resources. Pilot plant BETA in Hachinohe, Aomori targets 1 ton/year beryllium production by FY2027.
Product overview
MiRESSO operates two main business segments: (1) Beryllium Manufacturing and Sales Business, which produces and sells beryllium for fusion energy using proprietary low-temperature refining technology, with the BETA pilot plant as the production facility targeting FY2027; and (2) Technology Platform Business, which licenses the low-temperature refining technology and provides consulting/co-development services for other mineral resources including rare earths, lithium, and ceramics. The company is a QST-certified nuclear fusion startup developing beryllium as a neutron multiplier material.
Differentiator
Problem solved
Functional benefit
Products and services
- Beryllium Manufacturing and Sales Business Manufacturing and selling beryllium produced using proprietary low-temperature refining technology. Beryllium is sold as neutron multiplier material for fusion energy reactor blankets and also for existing applications in aerospace, medical imaging systems, and electronic components. Targets fusion energy companies and existing beryllium application industries.
- BETA Pilot Plant (Beryllium Testing Plant in Aomori) Pilot plant for beryllium manufacturing using low-temperature refining technology. Located at Pacific Metals Co., Ltd.'s facility in Hachinohe, Aomori Prefecture, Japan. Approximately 300 m² facility targeting 1 ton/year production capacity with commercial operation by FY2027.
- Technology Platform Business Technology platform offering joint development, consulting, and licensing services for low-temperature refining technology applied to mineral resources other than beryllium, including rare earths, lithium, ceramics, and recycling applications. Includes feasibility verification, process proposal, equipment introduction, and technology licensing for materials requiring high-temperature processing.
Quantifiable outcome
- Temperature reduction from 2,000°C to 300°C for beryllium ore dissolution
- +4 more outcomes
Companies that use Miresso
Customer profileNamed customers1 record
Segments3 records
Ideal customer profiles3 records
Miresso technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Miresso partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered major and core.
- Tokyo University Graduate School of EngineeringmajorJoint research partnership under NEDO's 2025 Advanced Research Program. MiRESSO and Tokyo University jointly proposed and were selected for R&D theme 'Environmentally Friendly Lithium Separation and Recovery Technology Research and Development.' Combines MiRESSO's low-temperature refining technology with Tokyo University's new separation precipitation technology.
- Helical FusioncoreStrategic business partnership for jointly advancing development of blanket materials and beryllium procurement specifications for Helical Fusion's steady-state fusion reactor development. Helical Fusion is developing the world's first helical-type steady-state fusion reactor targeting 2034 completion. MiRESSO provides beryllium expertise while Helical Fusion provides fusion reactor development knowledge. Both companies originated from Japanese national fusion research institutions (QST and NIFS respectively).
- Pacific Metals Co., Ltd.coreComprehensive business partnership agreement for beryllium manufacturing and sales business and technology platform business. Pacific Metals (PAMCO) provides manufacturing facility space at their Hachinohe plant for MiRESSO's pilot plant BETA. Pacific Metals contributes large-scale metal smelting expertise and manufacturing infrastructure. Joint goal is stable and low-cost domestic beryllium supply for fusion energy.
- JGC CorporationcoreBasic design contract for beryllium manufacturing pilot plant BETA. JGC Corporation, Japan's largest plant engineering company, is commissioned to perform basic design of the pilot facility. JGC brings extensive EPC (Engineering, Procurement, Construction) experience and non-ferrous metal smelting knowledge. JGC MIRAI Innovation Fund (CVC managed by JGC and Global Brain) is also an investor in MiRESSO.
Scale indicators6 records
Recent moves6 records
Expansion highlights6 records
Miresso competitors and assessment
Company assessmentDirect peers
- Materion Corporation: The largest Western producer of beryllium and beryllium-containing alloys, supplying aerospace, defense, medical, and nuclear applications globally. Directly comparable as a primary beryllium manufacturer serving industrial and nuclear-adjacent customers with the same end-markets MiRESSO targets.
- IBC Advanced Alloys: Manufacturer of beryllium-aluminum alloys and other beryllium-containing materials for aerospace, defense, and nuclear applications. Comparable as a specialized downstream beryllium alloy producer serving overlapping industrial end-uses.
- NGK Metals (subsidiary of NGK Insulators): Japan-based manufacturer of beryllium products (including beryllium-copper alloys) serving electronics, semiconductor, and industrial markets. The most direct domestic-Japan beryllium peer, sharing the same geographic market and several industrial customer segments.
Broad incumbents
- Ulba Metallurgical Plant (Kazatomprom): Kazakhstan-based integrated producer of beryllium, uranium, and tantalum products operated under Kazatomprom. Comparable as an incumbent, large-scale beryllium refiner with established global supply relationships, though MiRESSO's technology targets a fundamentally different cost structure.
Regional players
- Pacific Metals Co., Ltd. (PAMCO): Japanese non-ferrous metal smelter (ferronickel, specialty alloys) and MiRESSO's strategic host-partner for the BETA pilot plant. Comparable as a Japan-based non-ferrous metal refiner that could in principle extend into beryllium production itself; also a Series A strategic investor.
Others
- Commonwealth Fusion Systems: US-based commercial fusion developer (SPARC tokamak targeting first plasma in 2027, ARC power plant). Thematically related as a fusion developer that will need beryllium blanket materials, but not a beryllium producer; a potential future customer.
- TAE Technologies: US-based fusion developer pursuing field-reversed configuration (FRC) reactors. Comparable as a fusion ecosystem peer that represents a potential downstream customer for beryllium-based neutron multiplier materials.
- Helical Fusion: Japan-based developer of the world's first helical-type steady-state fusion reactor (target 2034), spun out of NIFS. Not a peer in beryllium production, but MiRESSO's anchor strategic customer and co-development partner for blanket materials; also a representative fusion ecosystem player.
- Tokamak Energy: UK-based spherical tokamak fusion developer. Comparable as a fusion ecosystem participant and potential future customer for fusion-grade beryllium supplies.
Emerging players
- Kyoto Fusioneering: Japan-based fusion engineering startup developing gyrotrons, tritium fuel cycle systems, and blanket technologies. Comparable as a Japanese fusion-adjacent deep-tech startup with overlapping investor base and complementary, rather than competing, technology scope.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks7 records
Key highlights7 records
Customer concentration
Miresso financial estimates
Financial estimateRevenue estimate
Valuation estimate
Miresso leadership team
Management profileNumber of profiles
Profiles3 records
Miresso funding detail
Funding detailFunding overview
Funding rounds3 records
Investors15 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Miresso M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Miresso
What does Miresso do?
MiRESSO manufactures and sells beryllium for nuclear fusion reactors using proprietary low-temperature refining technology (300°C vs. conventional 2,000°C) employing alkaline reagents and microwave heating. The company also operates a Technology Platform Business offering joint development, consulting, and licensing of the refining process for rare earths, lithium, ceramics, and other mineral resources. Pilot plant BETA in Hachinohe, Aomori targets 1 ton/year beryllium production by FY2027.
Is Miresso a public or private company?
Miresso is a private company. It is classified as venture growth investor backed and is currently operating.
When was Miresso founded?
Miresso was founded in 2023. It employs 11 to 50 people.
Where is Miresso based?
Miresso is headquartered in Misawa, Japan, in the Asia region.
How does Miresso make money?
Three revenue lines are on record. Beryllium Manufacturing and Sales Business are the primary driver. The others are technology Platform Business and joint Development and Consulting.
Who are Miresso's main competitors?
Direct peers on record are Materion Corporation, IBC Advanced Alloys and NGK Metals (subsidiary of NGK Insulators). Ulba Metallurgical Plant (Kazatomprom) is listed as a broad incumbent. Pacific Metals Co., Ltd. (PAMCO) is listed as a regional player. Others are Commonwealth Fusion Systems, TAE Technologies, Helical Fusion and Tokamak Energy. Kyoto Fusioneering is listed as an emerging player.
Does Miresso have an API?
No public API is recorded for Miresso.
What industry is Miresso in?
Miresso's product category is Fusion Energy Materials Manufacturing. Its primary akta.pro industry code is EUAKAIAB, Industrial Isotope Production & Supply (Co-60, Ir-192, Cs-137, Am-241, etc.). Its NAICS code is 325180 and its SIC code is 3330.