Best Construction Contractors Companies in Japan
The 59 best Construction Contractors companies in Japan in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Aldagram.
Japan's Construction Contractors sector doesn't have a unicorn yet, but the 59 companies tracked in this directory tell a focused story about where early capital is actually landing. Total disclosed funding sits at $24M, and Aldagram alone accounts for $20M of that, which means the remaining 58 companies are splitting $4M between them. That concentration is worth flagging if you're scanning for competitive white space.
The global backdrop gives context. The construction contracting market is forecast to reach roughly $2547.9B by 2024 with a 5.7% CAGR, driven by infrastructure investment and rising housing starts. And per recent market growth analysis, momentum is real even where coverage looks flat. I'd also point you to the app-layer signal: median install growth across 32 construction apps is running at roughly +15% YoY, which suggests digital adoption is quietly accelerating on the ground. The hot themes right now are post-disaster reconstruction and disaster recovery, both especially relevant given Japan's seismic exposure. Active investors in this cohort include Dun & Bradstreet, New Horizon Capital and ACA Investments. So the funding base exists. The room to grow into it is obvious.
Ranked: Best Construction Contractors companies in Japan
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Aldagram Provider of construction contracting services | $20M | 37 mo ago | Series A | Hikari Nagamine CEO | 2019 | EmotionReactGatsby+10 | — | 2 launchs |
| 2 | Myhm Myhm is a software developments firm that designs platforms for customized home designing, property research… | $2M | 59 mo ago | Seed | — | 2021 | STUDIOFirebaseNode.js+21 | — | — |
| 3 | Growba Provider of remodeling contractor services | $2M | 37 mo ago | Seed | — | 2014 | — | — | — |
| 4 | SOLTEC Co Provider of hillside construction, landslide prevention, and civil engineering services | — | 39 mo ago | Seed | Akira Shiota CEO | 2003 | WordPressMySQLPHP+16 | — | — |
| 5 | Abyss Japan Provider of interior work, demolition, restoration, and partial construction services | — | — | Acquired | Takashi Sasao CEO | 2021 | WordPressMySQLPHP+4 | — | — |
| 6 | asahi synchrotech Asahi Synchrotech specializes in offering air condition equipment, sanitary equipment, pulp, and paper… | — | — | Acquired | — | 1946 | WordPressApple iCloud MailMicrosoft 365+10 | — | — |
| 7 | Asahitech Company Provider of civil engineering services intended for the heavy industrial sector. | — | — | Acquired | — | 1988 | WordPressMySQLPHP+14 | 3 patents Protective anti‑corrosion coating technologies for marine/underwater structures | — |
| 8 | asunaro aoki construction Asunaro Aoki Construction offers building technology, civil engineering, renewal, research, and environmental… | — | — | Private | — | 1950 | WordPressMySQLPHP+9 | — | — |
Top 4 Construction Contractors companies in Japan
#1
Series A · Minato City, Tokyo · founded 2019 · 60 employees$20Mraised▾
Provider of construction contracting services
- May 2023Series A—
- May 2022Series A$20M
#2
Seed · Shibuya, Tokyo · founded 2014 · 25 employees$1.6Mraised▾
Developer of an online cloud-based platform designed to connect customers with the construction industry. The company's platform helps in combining the power of IT and the power of skilled people, enabling renovation companies to connect with a professional concierge who deeply understands the industry.
- May 2023Seed$1.6M
#3
Seed · Minato, Tokyo · founded 2021 · 1 employees$2.2Mraised▾
Developer of a home building platform designed to offer customer and property management. The company's platform manages information such as drawings, instruction manuals, housing companies, maintenance after delivery, and other information related to the house through a cloud-based application for digital customer service, enabling homeowners to manage information and receive various services like requesting an address change procedure by chatting to the concierge from the application.
- Jul 2021Seed$2.2M
#4
Seed · Suita, Osaka · founded 2003—raised▾
Provider of construction services to create safe mountain slopes. The company focuses on disaster prevention construction such as hillside construction and slope stabilization to prevent disasters such as landslides for the purpose of safety and security.
- Mar 2023Seed—
Funding & investor landscape
Market landscape — 10 sub-themes by coverage
Share of Construction Contractors coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
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.