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Mjolnir Spaceworks
Hybrid rocket engines and weldless fuel tanks for cost-effective, mass-produced space applications
About Mjolnir Spaceworks
Mjolnir Spaceworks specializes in the development of hybrid rocket engines and weldless fuel tanks, targeting the space industry. The company operates in the aerospace sector, focusing on creating cost-effective solutions for satellite and launch vehicle components. By utilizing a combustion method that combines solid plastic fuel with liquid oxidizer, their hybrid rocket engines offer a simpler structure compared to conventional engines, significantly reducing costs and enabling mass production. The plastic fuel is made from readily available materials, minimizing the risk of explosion. Additionally, Mjolnir Spaceworks produces weldless fuel tanks, which avoid the common issues associated with welded joints, such as loss of strength and defects. This innovation ensures stable quality and shorter delivery times, addressing a critical need in the space industry. The business model revolves around manufacturing and supplying these components to aerospace companies, generating revenue through sales of their proprietary technology. Mjolnir Spaceworks serves clients in the private space sector, aiming to enhance the efficiency and reliability of space missions.
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2020
- Headquarters
- Sapporo, Japan
- Employees
- 17
- Open positions
- None listed
- Dealroom signal
- 81.1/100
- Industry
- Energy, Space
- Sector
- Space, Space Tech, Rocketry Components, NIF defense security and resilience, NIF freedom of operations and mobility, DT and LS, science-based
- Technology
- Hardware, Deep Tech
- Business model
- Manufacturing
- Client focus
- b2b
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| DEBT✓Debt | May 2026 | $3.8M | — | Shoko Chukin Bank | ↗ |
| SERIES B✓Equity / VC | May 2026 | $9.2M | $69M | Incubate Fund · JIC Venture Growth Investments · Z Venture Capital · SPARX Asset Management | ↗ |
Growth signals
Latest recorded traffic for Mjolnir Spaceworks is 2.4K monthly website visits, down 22.6% over the last three months. Mjolnir Spaceworks's team grew 88.9% over the past year.
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed2 investors entered at this stage
UntroD Capital
Incubate Fund
Series A4 investors entered at this stage
Mitsubishi UFJ Capital
JIC Venture Growth Investments
Z Venture Capital
SPARX Asset Management
Series B and later1 investor entered at this stage
Shoko Chukin Bank
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Mjolnir Spaceworks on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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