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MJOLNIR SPACEWORKS Co., Ltd.

MJOLNIR SPACEWORKS Co., Ltd.

Private
SapporoFrontier & Industrial Techhttps://mjolnir-sw.com/

Last Round

Series B

May 29, 2026

Est. Valuation

$28.82M

Total Funding Raised

$12.68M

Momentum

Top 10%

of companies Caplight tracks

Company Overview

MJOLNIR SPACEWORKS Co., Ltd. is an aerospace company that develops and manufactures hybrid rocket engines and weldless fuel tanks to enable the mass production of rockets.

Sector

Frontier & Industrial Tech

Verticals

Space Technology, Defense Tech, Computing Hardware

Business Model

B2B

Customer Profile

Hardware Sales, Services & Consulting

AI Layer

Non-AI

Keywords

orbital infrastructurehybrid rocket enginesspace hardwarenewspaceweldless propellant tanksspace systems engineeringaerospace manufacturingdefense techlaunch vehicle componentsspace startuppropulsion systemsaerospace engineering

Historical Pricing

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Caplight Momentum Score

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MJOLNIR SPACEWORKS Co., Ltd. Comparables

Compare MJOLNIR SPACEWORKS Co., Ltd. with similar companies based on industry and business-model similarity.

MJOLNIR SPACEWORKS Co., Ltd. comparables — related companies by embedding similarity
CompanySimilarityMarket Cap
Pale Blue Inc.
75%
Letara株式会社
74%
Redwire Corporation
70%

MJOLNIR SPACEWORKS Co., Ltd. Funding Rounds

Historical fundraising activity

Data table
RoundDateAmount RaisedValuationInvestorsSources
Series BMay 29, 2026
GrantDec 29, 2025
Series A ExtensionOct 3, 2025
Series ADec 24, 2024
SeedJul 5, 2023

Key People

Founding team and executive leadership

Kazuo Yonekura

CEO

Executive Team

MJOLNIR SPACEWORKS Co., Ltd. Investors

Notable investors and investment history

MJOLNIR SPACEWORKS Co., Ltd. investors
InvestorRounds
北海道ベンチャーキャピタル株式会社Series B
Z Venture CapitalSeries B
JIC Venture Growth InvestmentsSeries B
Mitsubishi UFJ CapitalSeries B, Series A Extension, Series A
Incubate FundSeries B, Series A Extension, Seed, Series A
SPARX Asset ManagementSeries B
UntroD Capital Japan Inc.Series B, Series A Extension, Series A, Seed

Market signals

Structured signals derived from secondary market and firmographic data.

  • May 29, 2026

    $11M round with participation from Incubate Fund and Z Venture Capital.

  • Dec 29, 2025

    $11.5M grant from Japan Aerospace Exploration Agency

MJOLNIR SPACEWORKS Co., Ltd. Filings

SEC and related filings with document metadata.

Data table
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MJOLNIR SPACEWORKS Co., Ltd. Filings

SEC and related filings with document metadata.

Frequently Asked Questions

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Firmographic Details

HeadquartersSapporo
Employee Range18
Year Founded2020
Last FundingMay 29, 2026

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