Komaihaltec
Komaihaltec is a Tokyo-listed Japanese steel-engineering firm operating three pillars: bridge construction, steel structure fabrication, and renewable energy systems. It serves MLIT regional bureaus, NEXCO, JR East, and general contractors via S-grade certified factories and proprietary bridge technologies developed since 1883.
- Company typePublic
- Founded2010
- HeadquartersTokyo, Japan
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
What Komaihaltec does
Komaihaltec Inc. (株式会社駒井ハルテック, ticker 5915.T on the Tokyo Stock Exchange Prime Market) is a Tokyo-headquartered, publicly traded Japanese steel-engineering contractor operating across three business pillars: bridge construction, steel/steel-structure fabrication, and renewable energy systems. The company was formed on October 1, 2010, through the merger of Komai Iron Works Co., Ltd. (founded 1883) and Haltec Co., Ltd. (founded 1921), combining a 140-year engineering lineage with newer construction methodologies. Operations are anchored by S-grade certified manufacturing facilities in Futtsu (Chiba Prefecture) and Yura (Wakayama Prefecture) — one of only 15 companies/19 factories in Japan holding the highest S-grade steel fabrication credential — alongside production subsidiaries Tohoku Steel Bridge, CIPS, and KH FacilitEC.
The core revenue engine is design, fabrication, and on-site construction of steel bridges (long-span, highway, railway, Shinkansen) for public-works customers including MLIT regional bureaus, NEXCO Central/West, JR East, and JRTT, with additional contracts for steel structures supplied to general contractors. Revenue is generated primarily through competitive public-works bidding on multi-year contracts, complemented by private infrastructure work. Proprietary technology is a meaningful differentiator, spanning NETIS-registered methods such as APS anchor cables (Patent #3123644), corrugated web composite bridges, KOMET tuned mass dampers, ヒットロックK rust promoter, NR/R anchor systems, and the Hybrid Survey 3D measurement system.
The renewable energy pillar — added in recent years — distributes the KWT300 (300kW) domestic medium-scale wind turbine, parking-lot Sky Solar systems, and now offshore wind tower manufacturing following the March 2026 completion of the NEDO Green Innovation Fund facility at Futtsu. Revenue grew from JPY 35,453M (FY2019) to JPY 55,384M (FY2023), a 56% cumulative gain concentrated in FY2022 (+34%) and FY2023 (+39%), with 652 employees as of March 2024. The company is led by Representative President and CEO Komai Kihei following the April 2026 leadership transition, operating within an independent, wholly-owned-subsidiary corporate group with no controlling shareholder.
Komaihaltec firmographics
Firmographics- Name
- Komaihaltec
- Legal name
- 株式会社駒井ハルテック (KOMAIHALTEC INC.)
- Website
- https://komaihaltec.co.jp
- Company type
- Public
- Founded year
- 2010
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- Komaihaltec is a Tokyo-listed Japanese steel-engineering firm operating three pillars: bridge construction, steel structure fabrication, and renewable energy systems. It serves MLIT regional bureaus, NEXCO, JR East, and general contractors via S-grade certified factories and proprietary bridge technologies developed since 1883.
- Ownership category
- akta.pro rank
Komaihaltec industry classification
Industry- Product category
- Bridge Construction and Steel Structures
- NAICS
- Fabricated Structural Metal Manufacturing (332312), Structural Steel and Precast Concrete Contractors (238120), Plate Work and Fabricated Structural Product Manufacturing (33231)
- SIC
- Fabricated Structural Metal Products (3440), Prefabricated Metal Buildings & Components (3448)
- akta.pro primary industry
- Structural Steel Fabrication (IMADACAA)
- akta.pro secondary industries
- Metals & Steel Mill Facility Construction (IMAFADAF), Steel Plate, Sections & Welded Assemblies (IMADACAD)
Keywords
Where Komaihaltec is headquartered
LocationHeadquarters
- HQ city
- Tokyo
- HQ country
- Japan
- HQ region
- Asia
Offices4 records
Markets served
Komaihaltec business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Operations, Technology or R&D, Infrastructure
Revenue model
- Bridge Construction: Design, fabrication, and on-site construction of steel bridges including long-span bridges, highway bridges, and railway bridges. Revenue from public works contracts and private infrastructure projects.
- Steel Structure Manufacturing: Steel fabrication for buildings and industrial structures. S-grade certified factory (highest grade in Japan, only 15 companies/19 factories hold this certification).
- Renewable Energy Systems: Wind power generation systems including KWT300 turbines, offshore wind towers, and solar power systems. Complete solution services from planning to maintenance.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Bridge construction projects |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels4 records
Komaihaltec product offering
Product offeringCore offering
Komaihaltec is a comprehensive steel structure manufacturer operating across three business pillars: bridge construction (design, fabrication, and on-site construction of steel bridges including long-span, highway, and railway bridges); steel frame and steel structure fabrication for buildings and industrial facilities using S-grade certified factories; and renewable energy systems including the KWT300 wind turbine, offshore wind towers, and the Sky Solar parking lot solar system. The company delivers turnkey solutions from design through fabrication, construction, and maintenance, primarily serving Japanese government agencies and large construction firms through competitive public works bidding.
Product overview
株式会社駒井ハルテックは、橋梁事業・鉄骨・鉄構事業・再生可能エネルギー事業の3本を柱とする総合鋼構造物メーカー。橋梁事業ではハイブリッド測量、ヒットロックK、NRアンカー/Rアンカー、パイプスラブ、らくらくブラケット、アロンブルコート、TMD装置「KOMET」、波形ウエブ複合橋、鋼トラスウエブ複合橋、APSアンカーケーブル、SP床版ジャッキダウン工法、DASH工法、とらい工法など独自技術・製品を 개발。鉄骨・鉄構事業ではSグレード認定工場（全国15社19工場の内2工場）在籍し超高層ビル向け鉄骨を製作。再生可能エネルギー事業では300kW風力発電機KWT300、洋上風車タワー、スカイソーラーシステムを提供。設計から製作・施工・メンテナンスまで一貫体制。
Differentiator
Problem solved
Functional benefit
Brands
- KOMET: TMD (Tuned Mass Damper) device for vibration control in bridges and towers
- アロンブルコート® (Aronbl Coat)
- らくらくブラケット (Rakuraku Bracket)
- hitsurokkuK / ヒットロックK
- KWT300
Products and services
- Steel Bridge Construction Services End-to-end design, fabrication, and on-site construction of steel bridges including long-span bridges, highway bridges, and railway bridges for government agencies and infrastructure owners in Japan.
- Steel Frame and Steel Structure Fabrication
Quantifiable outcome
- JPY 55.4 billion in FY2023 revenue, representing 40% YoY growth
- +1 more outcomes
Companies that use Komaihaltec
Customer profileNamed customers5 records
Segments3 records
Ideal customer profiles3 records
Komaihaltec technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Komaihaltec partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core, major and minor.
- Tohoku Steel Bridge Corporation (東北鉄骨橋梁株式会社)coreRelated company in Miyagi Prefecture. Part of Komaihaltec group's manufacturing network. Participates in annual Factory Technology Exchange Meeting.
- CIPS Corporation (株式会社シップス)coreRelated company in Chiba Prefecture. Part of Komaihaltec group's manufacturing and sales network.
- KH Facilitec (KHファシリテック)coreRelated company in Fukuoka Prefecture. Part of Komaihaltec group's manufacturing network.
- IXAS (株式会社イクシス)majorConsortium partner in MLIT 'Innovative Technologies for Improving Construction Productivity' project. Selected for hybrid surveying technology implementation on bridge construction projects.
- IHI Infrastructure Systems (株式会社IHIインフラシステム)coreJoint development partner for 'Torai Method' urban intersection bridge construction. Also joint development of box girder internal anti-corrosion system (Patent #3971143).
- Okumura Corporation (株式会社奥村組)coreJoint development partner for 'Torai Method' urban intersection bridge construction.
- Katayama Strtec (片山ストラテック株式会社)minorJoint development partner for Pipeslab (steel-concrete composite slab) development.
- Kurimoto (株式会社栗本鐵工所)minorJoint development partner for Pipeslab (steel-concrete composite slab) development.
- Obayashi Corporation (株式会社大林組)coreJV partner for Sarugawa Bridge construction project. Steel truss web composite bridge application.
- Showa Concrete Industries (昭和コンクリート工業株式会社)coreJV partner for Sarugawa Bridge construction project.
- NEDO (国立研究開発法人新エネルギー・産業技術総合開発機構)majorGreen Innovation Fund recipient for offshore wind tower manufacturing facility construction at Futtsu Factory. Wind turbine component advanced technology R&D project.
Scale indicators8 records
Recent moves7 records
Expansion highlights5 records
Komaihaltec competitors and assessment
Company assessmentOthers
- Takenaka Corporation: Takenaka is one of Japan's largest general contractors and a customer of Komaihaltec for steel structure fabrication on building projects. While it does not directly compete in bridge fabrication, it is an important downstream channel for Komaihaltec's steel-frame business in super high-rise and large building construction.
Broad incumbents
- JFE Engineering: JFE Engineering is a large diversified engineering and construction arm of JFE Steel, with bridge steelwork as one segment within a much broader industrial EPC portfolio. Overlaps with Komaihaltec in steel bridge fabrication but operates at much greater scale across plants, pipelines, and energy infrastructure.
- Hitachi Zosen: Hitachi Zosen is a large Japanese heavy engineering company with steel structures, bridges, and offshore wind/marine infrastructure among its offerings. Comparable to Komaihaltec in bridge steelwork but at significantly larger scale and broader product portfolio.
- Mitsubishi Heavy Industries Bridge & Steel Structures: Mitsubishi Heavy Industries operates a long-standing bridge and steel structures business in Japan. As a much larger industrial conglomerate, it competes with Komaihaltec primarily on large-scale and complex bridge projects but with significantly broader capabilities across power, transportation, and industrial systems.
- Nippon Steel Engineering: Nippon Steel Engineering, a subsidiary of Nippon Steel, is a major player in steel structures, bridges, and offshore wind infrastructure. As a vertically integrated steel producer with a construction arm, it competes with Komaihaltec in both bridge fabrication and the offshore wind tower manufacturing opportunity.
Regional players
- Obayashi Corporation: Obayashi is a major Japanese general contractor and JV partner with Komaihaltec on bridge projects such as Sarugawa Bridge. As a construction company rather than a pure steel fabricator, it represents both an important customer and a downstream partner that competes with Komaihaltec on integrated design-build opportunities.
Direct peers
- Katayama Stratec: Katayama Stratec is a Japanese steel bridge and structural fabricator of comparable size to Komaihaltec. The companies are also joint development partners on Pipeslab (steel-concrete composite slab) technology, reflecting their similar scale, customer base, and product focus.
- Yokogawa Bridge: Yokogawa Bridge is one of Japan's largest long-span bridge fabricators and a direct competitor in steel bridge construction. Both companies serve MLIT, NEXCO, and JRTT contracts and hold S-grade steel fabrication certification, making them the closest direct head-to-head peer.
- IHI Infrastructure Systems: IHI's infrastructure systems subsidiary is a direct peer in steel bridge fabrication and structural steelwork in Japan. The two companies are also joint development partners on the Torai Method and box girder anti-corrosion system, reflecting their closely overlapping product lines and customer base.
- Kawada Industries: Kawada Industries is a Japanese steel bridge and structural steel fabricator with a comparable product portfolio (long-span bridges, steel structures) and similar MLIT/NEXCO customer base. Directly competes with Komaihaltec on highway and expressway bridge projects.
Market position
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Komaihaltec social profiles
Digital presenceKomaihaltec compliance and trust
Trust signalCompliance2 records
Komaihaltec financial estimates
Financial estimateRevenue estimate
Valuation estimate
Komaihaltec leadership team
Management profileNumber of profiles
Profiles2 records
Komaihaltec subsidiaries and ownership
Company hierarchySubsidiaries3 records
Komaihaltec funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Komaihaltec 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 Komaihaltec
What does Komaihaltec do?
Komaihaltec is a comprehensive steel structure manufacturer operating across three business pillars: bridge construction (design, fabrication, and on-site construction of steel bridges including long-span, highway, and railway bridges); steel frame and steel structure fabrication for buildings and industrial facilities using S-grade certified factories; and renewable energy systems including the KWT300 wind turbine, offshore wind towers, and the Sky Solar parking lot solar system. The company delivers turnkey solutions from design through fabrication, construction, and maintenance, primarily serving Japanese government agencies and large construction firms through competitive public works bidding.
Is Komaihaltec a public or private company?
Komaihaltec is a public company. It is classified as public and is currently operating.
When was Komaihaltec founded?
Komaihaltec was founded in 2010. It employs 251 to 500 people.
Where is Komaihaltec based?
Komaihaltec is headquartered in Tokyo, Japan, in the Asia region.
How does Komaihaltec make money?
Three revenue lines are on record. Bridge Construction is the primary driver. The others are steel Structure Manufacturing and renewable Energy Systems.
Who are Komaihaltec's main competitors?
Takenaka Corporation is listed as an others. Broad incumbents are JFE Engineering, Hitachi Zosen, Mitsubishi Heavy Industries Bridge & Steel Structures and Nippon Steel Engineering. Obayashi Corporation is listed as a regional player. Direct peers are Katayama Stratec, Yokogawa Bridge, IHI Infrastructure Systems and Kawada Industries.
Does Komaihaltec have an API?
No public API is recorded for Komaihaltec.
What industry is Komaihaltec in?
Komaihaltec's product category is Bridge Construction and Steel Structures. Its primary akta.pro industry code is IMADACAA, Structural Steel Fabrication, with a secondary code of IMAFADAF, Metals & Steel Mill Facility Construction. Its NAICS code is 332312 and its SIC code is 3440.