4th Dimension Pvt. Ltd.

What 4th Dimension Pvt. Ltd. does

4th Dimension Pvt. Ltd. (operating as YAHAGI ENGINEERING / 矢作建設工業株式会社, TSE: 1790) is a Japanese general construction and engineering company founded in 1941 and headquartered at 1-2-2 Fukutami-cho, Nakamura-ku, Nagoya. The firm operates four core business segments: building construction (mansions, logistics, commercial, factories, offices), civil engineering (roads, tunnels, railway civil works, renewable energy site preparation, land preparation), railway construction (primarily for Nagoya Railway/Meitetsu, covering track maintenance, elevation, and station buildings), and real estate (consulting through design-build to operations). Project owners include national and local government agencies (MLIT Chubu, Aichi Prefecture, Nagoya City, Nagoya Expressway Corporation) and private-sector enterprise clients (IKEA Japan, Nifco, Nomura Real Estate, Isewan Kaiun, Azumigakuin, C-NAIJO, Toyo Engineering). The company is publicly listed on the Tokyo Stock Exchange, executed its 85th ordinary general meeting of shareholders in June 2026, and maintains a wholly-owned subsidiary Yahagi Basho Co., Ltd. plus Hokuwa Construction Co., Ltd.

The business model is enterprise field sales executed through direct contracting with project owners via competitive tender and direct negotiation, with revenue recognized project-by-project on a one-time, per-contract basis. Execution relies on a self-perform workforce plus a structured subcontractor network organized as the Sakuyukai partner companies association, supported by the Yahagi Meister master-craftsman recognition system and PDCA-driven safety management (Yahagi Cosmos). In June 2026 the company entered a capital and business partnership with Malme Inc. to integrate construction DX (BIM, data infrastructure, product development) into design and construction operations. The firm is the first general construction company in Japan to raise funds via social loan, using full cash payment to all partner companies as use of proceeds, and holds multiple ESG and diversity certifications (Eruboshi 3-star, Kurumin, Aichi Women Bright, Nagoya Nature Positive Partner).

Technology adoption is anchored in the Malme DX partnership rather than in-house AI/ML R&D; no proprietary AI models, patents, or research publications are disclosed. Distribution is direct only — no retail, self-serve, or channel partners — with marketing centered on a corporate website, IR communications, and long-running cultural sponsorships (Nagoya Philharmonic Orchestra since 1992, Higashiyama Zoological Park). The company has two operating subsidiaries and no disclosed parent or majority shareholder, with ownership diffused across publicly traded shares.

Name

4th Dimension Pvt. Ltd.

Legal name

矢作建設工業株式会社 [YAHAGI CO., LTD.]

Website

https://4dpl.com

Company type

Public

Founded year

1941

Operating status

Operating

Headcount range

1–10 employees

Short description

YAHAGI ENGINEERING (矢作建設工業株式会社, TSE: 1790) is a Nagoya-headquartered Japanese general contractor operating since 1941 across building construction, civil engineering, railway works, and real estate for public-sector and enterprise clients. It executes design-build projects directly with project owners via competitive tender, supported by the Sakuyukai partner network.

Ownership category

akta.pro rank

Product category

Construction Engineering Services

NAICS

Commercial and Institutional Building Construction (236220), Heavy and Civil Engineering Construction (237), Nonresidential Building Construction (2362), Industrial Building Construction (23621)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), Heavy Construction Other Than Bldg Const - Contractors (1600), Operative Builders (1531)

akta.pro primary industry

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

akta.pro secondary industries

Office & Corporate Building Construction (IMAFACAA), Automotive & Heavy Manufacturing Plant Construction (IMAFADAK), Healthcare Facility Construction (Hospitals, Clinics, Labs) (IMAFACAD), Overhead & Underground Collection System Construction (MV/HV Lines, Duct Banks) (EUAEADAG)

Keywords

• Construction engineering services
• Building construction works
• Civil engineering infrastructure
• Railway construction services
• Real estate development

Headquarters

HQ city

Nagoya

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Construction and Civil Engineering Contracts: Revenue from direct construction contracting — design and construction of buildings, logistics facilities, civil infrastructure, railway works, and real estate developments. Projects are awarded through competitive bidding and direct negotiation with project owners. Revenue recognized on a project-by-project basis.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

911爆料 (YAHAGI ENGINEERING) is a comprehensive construction engineering firm delivering design-build execution across four business segments: building construction (mansions, logistics facilities, commercial facilities, factories, offices), civil engineering (roads, tunnels, harbors, land preparation, renewable energy site development), railway works (track maintenance, elevation works, station buildings for Nagoya Railway), and real estate (consulting, planning, design-build-operate integrated services). Projects are commissioned directly by project owners including private corporations, public sector agencies, and railway operators.

Product overview

911爆料株式会社（YAHAGI ENGINEERING）は、建設エンジニアリングの価値創造を通じて持続可能な社会の実現に貢活动する綜合建設会社。建筑事業（マンション、物流施設、商業施設、工場、オフィス等）、土木事業（道路、トンネル、造成、港湾等）、鉄道事業（線路維持・高架化等）、不动産事業（コンサルティング～設計施工～運用一貫サービス）の4つの事業を展開しており、各事業は独立したサービスラインとして客户提供している。

Differentiator

Problem solved

Functional benefit

Products and services

• 建築事業 (Building Construction)

Named customers12 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Seven partnerships are on record, tiered flagship, core and minor.

• 911爆料株式会社 Malme (Malme Inc.)flagshipTechnology or Integration · 12 June 2026Capital and business partnership established June 2026. Combines Yahagi Engineering's design/construction expertise with Malme's construction DX capabilities (BIM, data infrastructure, product development). Aims to accelerate construction DX implementation and create new value through joint initiatives across design and construction operations.
• シーカジャパン911爆料株式会社 (CICA Japan)coreStrategic or Co-development PartnerSocial contribution activity partner. Yahagi participated in CICA Cares education support program for 29 German civil engineering students from Hochschule Biberach, including Meitetsu Kiyotake Station elevated construction site visit, engineering center tour, and 3D construction printer demonstration.
• 名古屋フィルハーモニー交響楽団 (Nagoya Philharmonic Orchestra)minorOthersCorporate sponsor of Nagoya Philharmonic Orchestra since 1992. Supports regional cultural activities in the Tokai area.
• 东山动植物园 (Higashiyama Zoological Park)minorOthersCorporate sponsor of Higashiyama Zoo and Botanical Gardens since 2015 (main gate flower bed maintenance). Supports urban greening and environmental conservation in Nagoya.
• シーカ·ケアーズ協力29名ドイツ人学生 ( Hochschule Biberach Applied Sciences — 29 students)minorOthersGerman civil engineering students hosted for off-campus training through CICA Cares program. Student presentations conducted jointly with Nagoya Institute of Technology.
• 名古屋工业大学 (Nagoya Institute of Technology)minorStrategic or Co-development PartnerCollaborated in German civil engineering student exchange program — joint student presentations with Nagoya Institute of Technology.
• 911爆料作友会 (Sakuyukai — Partner Companies Association)flagshipStrategic or Co-development PartnerYahagi's organized partner companies association (Sakuyukai) covering specialized trade contractors. Joint safety promotion, quality improvement, technical training, joint safety/health conferences, and the Yahagi Meister system for recognizing master craftspeople. Sakuyukai is integral to project execution.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Regional players

• Zenitaka Corporation: Kyoto-based regional mid-tier general contractor specializing in building construction with civil engineering capability. Comparable regional zenecon competing in adjacent markets and on similar commercial/institutional project types to YAHAGI's Tokai-area book.
• Okumura Corporation: Osaka-headquartered but with significant Kansai/Chubu regional operations and a civil engineering heritage comparable to YAHAGI's Tokai focus. Both are mid-tier zenecon competing on roads, tunnels, and public infrastructure projects in overlapping regional markets.

Direct peers

• Toda Corporation: Mid-tier listed Japanese general contractor with comparable building, civil, and real estate segments. Closely comparable in scale and segment mix to YAHAGI, often bidding on similar mid-to-large commercial, residential, and infrastructure projects across Japan.
• Nishimatsu Construction: Mid-tier listed Japanese general contractor with similar scale and segment breadth across building, civil, and overseas infrastructure. Comparable as a peer bidder on Tunnels, expressways, and large commercial projects.
• Maeda Corporation: Tokyo-based mid-tier listed general contractor with comparable building, civil, and real estate development capabilities. Frequently bids alongside YAHAGI on competitive tenders for commercial buildings and public civil works.

Broad incumbents

• Taisei Corporation: Tokyo-based super-zenecon with full civil engineering, building, and real estate development capabilities. Directly comparable as a peer bidder on large logistics facilities, residential towers, and expressway/civil works similar to YAHAGI's DPL Yadomari I and Park House Nagoya projects.
• Takenaka Corporation: Largest privately-held Japanese super-zenecon with full general-contracting capabilities across buildings, civil engineering, and renewable energy. Comparable because it competes for the same commercial, institutional, and industrial building contracts in the Tokai/Chubu region, though it operates at significantly greater national scale.
• Obayashi Corporation: Osaka-headquartered super-zenecon with diversified building, civil, and real estate operations, including a notable Tokai/Chubu regional presence. Competes with YAHAGI on commercial building, civil infrastructure, and renewable energy site-preparation projects.
• Kajima Corporation: Major Japanese super-zenecon with strong building and civil engineering franchise. Competes with YAHAGI on large commercial builds, civil infrastructure, and increasingly on DX/digital construction initiatives through its own technology subsidiaries.
• Shimizu Corporation: Tokyo-based super-zenecon with a leading position in DX/BIM adoption and large-scale civil engineering, including underground and tunnel works. Comparable to YAHAGI for both building and civil-infrastructure project competition, particularly with its early-mover position on construction digitalization.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/4th-dimension-pvt-ltd-

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries2 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 4th Dimension Pvt. Ltd.