Best Aerospace, Maritime and Defense Companies in Japan
The 58 best Aerospace, Maritime and Defense companies in Japan in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Space BD.
Japan's Aerospace, Maritime and Defense sector has 58 companies on our radar, and the funding picture is sharper than most people expect. Total disclosed equity sits at $65M across those firms, with Space BD pulling $26M and ArkEdge Space close behind at $22M. No unicorns yet, but the concentration of capital tells you something: a handful of bets are absorbing most of the oxygen, while investors like Incubate Fund, Mizuho Capital and SMBC Venture Capital circle the space-tech layer specifically. I'd watch that dynamic closely this year.
The macro current is real. The global Aerospace, Maritime and Defense market runs at roughly $1076.6B, forecast to hold that scale through 2027 at a 5.9% CAGR, driven by growing investment flows and geopolitical pressure that's reshaping national security strategy across the Asia-Pacific. Median app install growth across defense, maritime and aerospace titles is running about 15% year-over-year, which, if you track digital engagement as a leading indicator, suggests the sector's pulling fresh attention from operators and procurement teams alike. So what's actually moving? Themes like diplomatic alliances and litigation defenses are dominating industry conversation, and Japan's position inside those conversations is getting louder by the quarter.
- prnewswire.com
Our analysis of 50 Aerospace, Maritime and Defense companies
$6.7b in tracked funding; 89% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Aerospace, Maritime and Defense companies in Japan
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Space BD Provider of technical development and industrialization services focused on space | $26M | 5 mo ago | Series C | Masatoshi Nagasaki Co-Founder & CEO | 2017 | WordPressMySQLPHP+20 | — | — |
| 2 | ArkEdge Space Provider of satellite remote sensing and space development services | $22M | 17 mo ago | Series B | Toshihiro Shibukawa Co-Founder | 2021 | WordPressApple iCloud MailGoogle Workspace+23 | 7 patents Satellite communication hardware: antenna design and signal processing for space‑ground links | — |
| 3 | Space Data Provider of research and development to merge space and digital technologies | $10M | 47 mo ago | Seed | Katsuaki Sato Founder & CEO | 2017 | STUDIOFirebaseNode.js+14 | — | — |
| 4 | Digital Blast Provider of space research industry | $3M | 48 mo ago | Seed | — | 2018 | WordPressMySQLPHP+13 | — | — |
| 5 | Innovative Space Carrier Provider of space transportation vehicles services | $2M | 3 mo ago | Series A | Kojiro Hatada CEO | 2022 | WordPressMySQLPHP+14 | — | — |
| 6 | AirKamuy VTOL aircraft developers | $702K | 14 mo ago | Seed | Takumi Yamaguchi Co-Founder & CEO | 2022 | WordPress Block EditorWordPressApple iCloud Mail+20 | — | — |
| 7 | IHI Manufacturer of heavy machinery equipment | — | 189 mo ago | Public | — | 1853 | Apple iCloud MailAmazon ALBAmazon Web Services+15 | 10,566 patents Patents concentrated in mechanical & energy engineering | 2 partnerships |
| 8 | A-Cosmos Provider of information technology solutions, including system and network infrastructure | — | — | Unfunded | Hisahi Iwamoto Owner | 1999 | — | 6 patents Packaging lid-opening mechanisms and electronic component click/rheostat actuation devices | — |
Top 7 Aerospace, Maritime and Defense companies in Japan
#1
Series C · Tokyo, Tokyo · founded 2017 · 34 employees$25.9Mraised▾
Provider of technical development and industrialization services focused on space
- Jan 2026Series C$15.1M
- Dec 2021Series A$8.8M
- Apr 2017Seed$1.9M
#2
Series A · Chuo, Tokyo · founded 2022 · 20 employees$2.2Mraised▾
Innovative Space Carrier Inc. is an aerospace company focused on developing high-frequency, single-stage, reusable space transportation vehicles using Japanese domestic technologies. They aim to reduce the cost of space transportation and offer services for high-speed transportation between points and space travel.
#3
Series B · Tokyo, Tokyo · founded 2021 · 100 employees$22.4Mraised▾
Provider of satellite remote sensing and space development services
#4
Seed · Tokyo, Tokyo · founded 2022$702.2Kraised▾
VTOL aircraft developers. It designs and manufactures electric aircraft with vertical take off and landing capabilities for applications such as logistics, search, and surveillance. It features wings that can fold mid-flight.
- Apr 2025Seed$702.2K
- Apr 2024Conventional Debt—
#5
Seed · Shibuya, Tokyo · founded 2017$10.5Mraised▾
SpaceData Inc. is a startup focused on research and development aiming to merge space and digital technologies. They invent, patent, and utilize innovative technologies with a vision to "create a new space." They are at the forefront of wireless service and solutions for locations lacking connectivity.
- Aug 2022Seed$10.5M
#6
Seed · Chiyoda City, Tokyo · founded 2018 · 82 employees$2.9Mraised▾
Operator of digital consulting and data platforms intended to focus primarily on the space industry. The company supports clients to implement best practices of space business by teaming up with experts who have market-leading knowledge, experience, and connections to help from the discovery of issues to the implementation of solutions, and bringing about social change, enabling clients to create value in all actions and activities.
- Jul 2022Seed$2.9M
#7
Public · Tokyo, Tokyo · founded 1853 · 27562 employees—raised▾
IHI is a heavy equipment manufacturing company. Its products include ships, jet engines, industrial machinery, construction machinery, energy systems & more. It provides services to corporates. In 2020, the company recorded annual revenues of $11.5 B and a net profit of $28.2 M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Aerospace, Maritime and Defense coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Defense Technology is moving in Japan
A read on the academic research around Defense Technology — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 8 Japan-affiliated papers.
- Canon1
- National Defense Academy of Japan1
- Tokyo University of Technology1
- University of the Ryukyus1
- Asia University1
- Missile1
- Missile guidance1
- Missile defense1
- Aerospace engineering1
- Aeronautics1
- Electronic warfare2
- Infantry1
- Software1
- Jamming1
- Systems engineering1
- Nuclear weapon2
- Rivalry2
- Persian1
- Missile1
- Vulnerability (computing)1
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.