Showa Concrete Industry

What Showa Concrete Industry does

Showa Concrete Industry (昭和コンクリート工業株式会社) is a Japanese private manufacturer specializing in prestressed concrete (PC) and precast concrete (PCa) products, founded in 1956 and headquartered in Gifu City, Gifu Prefecture. The company operates nine nationwide factories producing custom-made, high-strength, high-durability precast concrete components organized around four business segments: PC bridge construction (including new construction, repair, reinforcement, and renewal), PCa civil engineering products (culverts, retaining walls, road, waterway, river, disaster prevention, and bridge-related items), PCa architectural products, and a renewal/maintenance business. The company claims a cumulative track record of approximately 8,000 bridges constructed nationwide, including field-cast bridges with central spans in the 200m class.

The company's competitive position rests on a portfolio of proprietary construction methods — notably the Z Spiral Method for precast PC slab joints, the Smile Parallel Method for occupied-building seismic reinforcement, the Sinking Method (沈埋工法) certified by the Japan Institute of Sewerage Engineering, OSJ (Open Shield Jacking), TSKJ (seismic/waterproof/flexible joint), and Lift Roller — together with an integrated technical subsidiary (Concrete Techno Consult) providing design, inspection, diagnosis, structural analysis, and CIM/3D modeling services. Raw material supply, logistics, and landscaping are handled by group affiliates Showa Sangyo, Showa Unyu (captive heavy-haul with 40-ton pole trailers), and Showa Zoen.

Commercially, Showa operates as a direct-sales manufacturer supplying primarily Japanese public-sector clients — national expressway companies (notably Central Japan Expressway Company), regional development bureaus (Kanto, Chubu, Hokuriku, Kyushu), prefectures, and municipalities — via regional sales offices, a dedicated technical consultation desk (0120-967-740), and Zoom-enabled inquiry channels. Pricing is custom quote-based on engineering specifications, with no public rate cards. Distribution is direct factory-to-site, leveraging the captive Showa Unyu fleet for oversize loads. The company is recognized repeatedly by regional development bureaus for construction quality and safety, and is a multi-cycle recipient of the Prestressed Concrete Engineering Society Product Award and All-Japan Construction Technology Association Zenshoken Award.

Name

Showa Concrete Industry

Legal name

昭和コンクリート工業株式会社

Website

https://showa-con.co.jp

Company type

Private

Founded year

1956

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Showa Concrete Industry is a Japanese private manufacturer of prestressed and precast concrete products, supplying bridges, culverts, and infrastructure components primarily to national expressway authorities, regional development bureaus, and municipal governments across Japan.

Ownership category

akta.pro rank

Product category

Precast Concrete Products

NAICS

Cement and Concrete Product Manufacturing (3273), Other Concrete Product Manufacturing (327390), Structural Steel and Precast Concrete Contractors (238120)

SIC

Concrete Products, Except Block & Brick (3272), Concrete, Gypsum & Plaster Products (3270)

akta.pro primary industry

Precast Concrete Products (IMADAAAB)

akta.pro secondary industry

Concrete Pipe, Box Culverts & Drainage Structures (IMADAAAD)

Keywords

• Precast concrete products
• Prestressed concrete bridges
• Civil engineering concrete
• Infrastructure renewal services
• Construction methods

Headquarters

HQ city

Gifu

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. PCa Civil Engineering Concrete Products: Precast concrete products for civil engineering applications including box culverts, retaining walls, road drainage, waterways, river structures, slabs, disaster prevention products, bridge components, and special products. Manufactured at nine nationwide factories on an order-made basis.
2. PC Bridge Construction: PC bridge construction services including new construction, repair, reinforcement, and renewal. Includes specialized structures such as sheds, shelters, and PC tanks. The company has constructed approximately 8,000 bridges nationwide, including the Iwaki Bridge with a central span of 200m class.
3. PCa Architectural Concrete Products: Precast concrete products for architectural applications.
4. Renewal/Renovation Services: Bridge and infrastructure renewal, repair, reinforcement, and renewal construction services.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Showa Concrete Industry manufactures precast concrete (PCa) and prestressed concrete (PC) products and provides PC bridge construction services across Japan. Operating nine nationwide factories, it produces custom-made high-strength, high-durability concrete components for civil engineering, architectural, and infrastructure renewal applications. The company serves as the leading PCa company in Japan with approximately 8,000 bridges constructed nationwide.

Product overview

Showa Concrete Industry is a precast concrete (PCa) and prestressed concrete (PC) leading company with 9 nationwide factories offering custom-made high-strength, high-durability products. The company operates two core PC technologies (Prestressed Concrete and Precast Concrete) integrated with manufacturing and construction expertise to deliver four main business areas: PC construction (bridge construction), PCa civil engineering products, PCa architecture products, and renewal/maintenance services. The product portfolio includes diverse precast concrete solutions categorized by application: culverts, retaining walls and slope protection, road products, waterways, river structures, slabs and plates, disaster prevention products, bridge components, and specialized construction methods. Products are available nationwide and comply with JIS standards including JIS A 5373 for precast prestressed concrete products. The company also provides CAD data downloads for products and offers engineering consulting through subsidiary Concrete Techno Consul.

Differentiator

Problem solved

Functional benefit

Products and services

• PC Bridge Construction (Prestressed Concrete Bridge) Prestressed concrete bridge construction using PC (Prestressed Concrete) technology, including on-site casting and large-scale bridge construction with central spans of 200m class. Approximately 8,000 bridges constructed nationwide.
• PCa Civil Engineering Concrete Products Precast concrete products for civil engineering applications including box culverts, retaining walls, water channels, river structures, road products, slabs, and disaster prevention products.
• PCa Architecture Concrete Products Precast concrete products for architectural applications including structural and non-structural building components.
• Renewal Business Bridge and infrastructure repair, reinforcement, and renewal construction services including slab replacement and maintenance work.
• Smile Parallel Method (Smile Parallel Construction Method) External seismic reinforcement method applying diagonal PC steel materials to RC and SRC buildings using precast column and beam frames with PC structure installed on the exterior of existing buildings. Achieves seismic reinforcement while maintaining building occupancy, natural light, and ventilation.
• Specialized Construction Methods Specialized construction methods including TSKJ (seismic/waterproof/flexible joint), SBC (steel ball/winch horizontal pulling), Lift Roller (self-propelled installation for locations where crane work is impossible), OSJ (Open Shield Jacking), Textspan (arch structure), Sinking (box culvert sinking), Loop Arch, and Perfect Seal joint methods.
• Concrete Techno Consult Services Subsidiary company providing integrated PC bridge services: design (new construction, repair, CIM/3D modeling), inspection and diagnosis, structural analysis, and construction material sales.

Quantifiable outcome

• Approximately 8,000 bridges constructed nationwide, including 200m+ central span bridges
• +3 more outcomes

Named customers8 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Six partnerships are on record, tiered core and minor.

• 昭和産業株式会社 (Showa Sangyo Corporation)coreStrategic or Co-development PartnerShowa Sangyo is a group company within the Showa Concrete Group, producing ready-mixed concrete and providing cement/construction material transport services in Nagano Prefecture. It operates a home center and golf center, expanding the group's presence in the retail and lifestyle sectors.
• 昭和運輸株式会社 (Showa Unyu Corporation)coreStrategic or Co-development PartnerShowa Unyu handles all product transportation for Showa Concrete Industry, including long-load and heavy-load transport of bridge girders using pole trailers with up to 40-ton capacity. The company also performs installation and setup work. Established in 1965 with capital of 24 million yen, headquartered in Gifu.
• 昭和造園土木株式会社 (Showa Zoen Corporation)minorStrategic or Co-development PartnerShowa Zoen provides landscaping, garden creation, and maintenance services, as well as civil engineering work. It manages public parks under the designated management system, including the Gifu City Livestock Center Park and Hyakunen Park.
• 株式会社コンクリートテクノコンサル (Concrete Techno Consult Corporation)coreStrategic or Co-development PartnerA subsidiary providing integrated PC bridge services: design (new construction, repair, CIM/3D modeling), inspection and diagnosis, structural analysis, and construction material sales. Staff hold certifications including Professional Engineer (技術士), RCCM, Concrete Diagnosis Engineer (コンクリート診断士), and 1st-class civil engineering management technicians. Located at the Showa Concrete Industry headquarters.
• 全日本建設技術協会 (All-Japan Construction Technology Association)minorOthersAwarding body for the 全建賞 (Zenshoken Award) given to the Iwaki Bridge project. Represents an industry recognition and potential technical collaboration body.
• 公益社団法人プレストレストコンクリート工学会 (Prestressed Concrete Engineering Society)minorOthersAwarding body for the 作品賞 (Product Award) given to the Iwaki Bridge. Professional/technical society for prestressed concrete engineering.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Regional players

• Japan Prestressed Concrete Institute-affiliated precast manufacturers (e.g., Gifu Concrete / regional PCa makers): Regional precast concrete manufacturers across Japan competing for local government tenders. They overlap with Showa on routine box culverts, retaining walls, and standard precast items but typically lack Showa's nationwide nine-factory footprint and proprietary specialty methods.

Broad incumbents

• Maeda Corporation: Established Japanese general contractor active in civil engineering and infrastructure including bridges. Overlaps with Showa on public infrastructure tenders but operates across a much wider portfolio of construction services.
• Taisei Corporation: Major Japanese super-zene general contractor. Has substantial precast concrete and bridge construction capabilities, competing for the same public infrastructure tenders Showa targets, but as part of a much broader portfolio.
• Tokyu Construction Co., Ltd. Diversified infrastructure and civil engineering contractor in Japan with PC bridge and precast concrete capability. Competes with Showa in bridge and renewal work while serving a broader civil engineering market.
• Hazama Ando Corporation: Large Japanese general contractor with deep civil engineering and bridge construction capabilities. Competes in public infrastructure tenders including bridges and renewal work, though precast concrete is not its sole focus.
• Fujita Corporation: Diversified Japanese general contractor with civil engineering and infrastructure capabilities. Competes for public works bridge and renewal contracts comparable to Showa's core segments, alongside broader building and development work.
• Sumitomo Mitsui Construction Co., Ltd. Major Japanese general contractor with significant PC bridge and precast concrete operations. Competes on large-scale bridge and infrastructure projects while also serving broader construction segments beyond Showa's specialist focus.

Direct peers

• P.S. Mitsubishi Construction Co., Ltd. Specialist PC bridge contractor spun out of Mitsubishi. Competes head-to-head in PC bridge construction, repair/reinforcement, and precast concrete products for expressways and national highways in Japan.
• Kawada Industries, Inc. Manufactures steel and PC bridges and structural systems. Overlaps with Showa in bridge construction, including hybrid steel-PC structures and bridge-related precast components for public works.
• Oriental Shiraishi Corporation: Japan's largest PC (prestressed concrete) bridge construction company. Directly competes with Showa Concrete in PC bridge erection, precast concrete product manufacturing, and seismic reinforcement for public infrastructure projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Instagraminstagram.com/showa_con.recruit

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Showa Concrete Industry