Taiyo Kisokogyo

What Taiyo Kisokogyo does

Taiyo Kisokogyo Co., Ltd. (太洋基礎工業株式会社, TSE: 1758) is a Japanese specialty civil engineering and foundation construction contractor, established around 1968 and headquartered in Nagoya, Aichi Prefecture. The company provides specialized civil engineering services — including foundation work, trenchless pipe installation, ground improvement, water/sewer/drainage infrastructure, and environmental remediation — using proprietary construction methods developed in-house at the Kamori Research and Development Center in Tsu City, Mie Prefecture. Notable proprietary technology includes the arc-shaped propulsion machine (弧状推進機), a specialized tunneling device for trenchless underground construction referenced in an October 2025 manufacturing contract.

The company earns revenue primarily through project-based construction contracts awarded via competitive public-works bidding, with its primary customer segment being Japanese municipal, prefectural, and national government agencies (e.g., City of Nagoya, Tokyo Metropolitan Government, Kumamoto City, Shizuoka City Waterworks Bureau). A secondary private-sector segment serves real estate developers and general contractors. Pricing is not publicly disclosed; the company operates 23 offices across all major Japanese regions to support regional bidding and project execution. In 2025, the company entered a JICA SMEs/SDGs Business Support partnership to begin internationalizing its proprietary methods, conducting its first Vietnam technical seminar on river-dredging sediment reuse in June 2026.

Taiyo Kisokogyo is a publicly listed company on the Tokyo Stock Exchange with 101–250 employees. In recent years the firm has modernized its governance (transition to Audit and Supervisory Committee structure in December 2023, restricted-stock compensation plan in 2024), refreshed senior leadership (Chairman/President changes announced December 2025), and pursued operational consolidation (absorption merger of a Kyushu subsidiary in March 2021). The company is currently in its 60th fiscal period (fiscal year ending January 2027).

Name

Taiyo Kisokogyo

Legal name

太洋基礎工業株式会社

Website

https://taiyoukiso.co.jp

Company type

Public

Founded year

1968

Operating status

Operating

Headcount range

101–250 employees

Short description

Taiyo Kisokogyo is a Japanese specialty civil engineering and foundation construction contractor that uses proprietary methods to deliver public infrastructure projects (water, sewer, drainage, roads, foundations) for government agencies across Japan, with growing international activity via JICA.

Ownership category

akta.pro rank

Product category

Civil Engineering Construction

NAICS

Heavy and Civil Engineering Construction (237), Utility System Construction (2371), Engineering Services (541330)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), Construction - Special Trade Contractors (1700)

akta.pro primary industry

Construction Program Management (Multi-site/Portfolio) (IMAFAAAF)

Keywords

• Civil engineering services
• Foundation construction
• Underground infrastructure
• Trenchless pipe installation
• Ground improvement works

Headquarters

HQ city

Nagoya

HQ country

Japan

HQ region

Asia

Offices23 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Civil Engineering Construction Services: The company earns revenue through civil engineering construction projects, primarily serving public-sector clients (government agencies, municipalities) and private sector entities. Revenue is project-based, with multi-year projects and contracts as evidenced by their order book and JICA international projects.
2. International Technical Services: Revenue generated from international technical cooperation projects including JICA programs, conducting technical seminars abroad and providing consulting services for infrastructure development in emerging markets.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

Taiyo Kisokogyo is a Japanese special civil engineering and foundation construction contractor that designs and executes infrastructure projects — including foundation work, underground utility installation, water/sewer systems, road construction, ground improvement, and environmental remediation — using proprietary construction methods developed in-house. The company serves primarily government agencies and private developers through project-based contracts, with nationwide coverage via 23 offices in Japan and selective international projects through JICA. Supporting equipment is designed, manufactured, and maintained at the Kamori R&D Center.

Product overview

Taiyo Kisokogyo is a civil engineering and foundation construction company that provides specialized construction services using proprietary methods developed in-house. The company's core offering centers on special civil engineering technologies and unique construction methodologies that support urban infrastructure development. Beyond their primary construction services, they publish the monthly 'Taiyo Shinbun' newsletter and offer career opportunities in construction management, geological surveys, and machinery maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Special Civil Engineering and Proprietary Method Construction Services Specialized civil engineering services using proprietary in-house-developed construction methods for foundation and underground construction work, including foundation construction, water/sewer/drainage infrastructure, road construction, ground improvement, and environmental remediation. Supports urban infrastructure development for Japanese government agencies and private developers.
• Construction Management and Engineering Services Construction management services including civil/building construction management, geological surveys, boring investigations, mechanical manufacturing, and maintenance of company-owned equipment at the Kamori Research and Development Center in Tsushima, Aichi Prefecture. Supports execution of foundation and underground construction projects.
• International Technical Cooperation and Consulting Services International technical services delivered through JICA (Japan International Cooperation Agency) cooperation programs and bilateral aid projects, including technical seminars abroad (e.g., river dredging sediment reuse system seminar in Vietnam) and consulting services for infrastructure development in emerging markets. Promotes the company's proprietary civil engineering technologies in overseas markets.

Named customers8 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Six partnerships are on record, tiered minor and core.

• 弧状推進機製作契約先 (Arc-shaped Propulsion Machine Manufacturing Partner)minorOthers · 14 October 2025The company entered into a manufacturing contract for their proprietary arc-shaped tunneling machine (弧状推進機) in October 2025.
• JICA (Japan International Cooperation Agency)coreStrategic or Co-development Partner · 16 June 2025Taiyo Kisokogyo has signed a contract for the JICA「中小企業･SDGsビジネス支援事業」(Small and Medium Enterprises SDGs Business Support Program). Under this partnership, the company conducts international technical seminars, including a river dredging sediment reuse system technical seminar (河川掘削泥土再利用システム技術セミナー) in Vietnam, promoting their proprietary technologies in emerging markets.
• Trust Construction Co., Ltd. (株式会社トラスト建設)minorStrategic or Co-development Partner · 19 January 2021Taiyo Kisokogyo entered into a business partnership (業務提携) with Trust Construction in January 2021 for collaborative civil engineering projects.
• NPO Desert Greening Nagoya (NPO沙漠緑化ナゴヤ)minorOthersThe company supports the NPO Desert Greening Nagoya organization as part of its CSR and social contribution activities.
• Nakagawa Ward Construction Industry Crime Prevention Association (中川区建筑业防犯協会)minorOthersAffiliated with the Nakagawa Ward Construction Industry Crime Prevention Association, participating in industry self-regulation and crime prevention initiatives.
• Family Friend Net Aichi (ファミフレネットあいち)minorOthersAffiliated with Family Friend Net Aichi, a work-life balance support program in Aichi Prefecture.

Scale indicators3 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• Obayashi Corporation: Tier-1 Japanese general contractor with civil engineering and infrastructure operations — broader portfolio but competes in foundation and underground segments.
• Shimizu Corporation: Major Japanese general contractor with extensive civil engineering and underground construction division — broader scope but competes on the same public infrastructure tenders.
• Toda Corporation: Established Japanese general contractor with civil engineering and infrastructure construction divisions — comparable in the public infrastructure bidding landscape though broader in scope.
• Kajima Corporation: One of Japan's tier-1 general contractors with major civil engineering capabilities — broader portfolio but overlapping public infrastructure customer base and project types.

Direct peers

• Fudo Tetra Corporation: Japanese specialty civil engineering and foundation contractor focused on ground improvement, slope stabilization, and underground construction — directly comparable to Taiyo Kisokogyo's core foundation and trenchless methods business.
• Toko Electrical Construction: Japanese public-listed specialty contractor with civil engineering and infrastructure service lines — comparable scale, listed status and public-works customer profile.
• Nippon Kensetsu Kaihatsu Co., Ltd. Mid-cap Japanese civil engineering contractor with focus on foundation, ground improvement and water/sewer infrastructure — directly comparable in customer segment and technical specialization.
• Raito Kogyo Co., Ltd. Listed Japanese specialty contractor specializing in slope/ground stabilization, foundation work, and soil remediation — closely comparable product offering and public-sector customer base to Taiyo Kisokogyo.
• Nippon Shokubai: Not a direct peer — see actual peers below. Excluded due to misalignment.

Emerging players

• Geostr Corporation: Japanese specialty contractor focused on ground improvement and soil remediation technologies — narrower geographic and product focus but overlapping technical methodology with Taiyo's proprietary approach.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Instagraminstagram.com/taiyo_kisokogyo/?locale=ja_JP

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Taiyo Kisokogyo