What Dai-Dan does

Dai-Dan Co., Ltd. (ダイダン株式会社, TSE Prime: 1980) is a Japanese building equipment engineering contractor founded in 1907 with origins in Nankai railway electrical work. Headquartered in Osaka with a nationwide branch network across Japan and operations in Thailand, Dai-Dan delivers integrated electrical, HVAC/air-conditioning, and plumbing/sanitation installation services for large-scale construction projects. The company serves four primary segments: general commercial buildings, industrial facilities (semiconductor factories, data centers, battery plants), healthcare facilities (hospitals, medical research centers, regenerative medicine), and overseas projects. Customers include general contractors (ゼネコン), design firms, building owners, and manufacturers, reached through a direct enterprise field sales motion.

Dai-Dan's technical differentiation rests on over 20 proprietary technologies with registered patents, including ZEB (Zero Energy Building) solutions demonstrated through the Enefis® brand (Hokkaido, Shikoku, Kyushu), supercritical CO2 air filter regeneration technology developed jointly with Tohoku University and AIST, Flow Smart® variable-flow HVAC pump control, Air Barrier Booth® cleanroom systems, REMOVIS® cloud-based building monitoring, and specialized medical/surgical room HVAC. The company holds ZEB Planner and ZEB Leading Owner registrations, has implemented 5 ZEB buildings, and earned multiple CASBEE S-rank, LEED Platinum, and BELS 5-star certifications. A Technical Research Laboratory in Miyoshi, Saitama supports ongoing R&D.

Revenue is generated primarily through one-time project-based construction contracts under four business segments — air conditioning/sanitation construction (core), electrical installation (transforming/growing), overseas operations, and regenerative medicine services through subsidiary Cerabo Healthcare Service. FY2025 March consolidated net sales reached ¥262.7 billion with operating profit of ¥23 billion and ROE of 17.4%, significantly exceeding Mid-Term Management Plan targets. Dai-Dan also operates the Meister certification system recognizing 57 skilled foremen across 5 trade categories from partner companies, and launched Daidan AI Chat (Azure OpenAI-based) in March 2024 for internal productivity and knowledge management.

Name

Dai-Dan

Legal name

ダイダン株式会社

Website

https://daidan.co.jp

Company type

Public

Founded year

1907

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Dai-Dan is a Japanese building equipment engineering contractor providing integrated electrical, HVAC, and plumbing installation for commercial, industrial, healthcare, and semiconductor facilities, serving general contractors and building owners across Japan via direct enterprise field sales.

Ownership category

akta.pro rank

Product category

Building Equipment Engineering (Mechanical & Electrical Construction Services)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Nonresidential Building Construction (2362)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

Building Automation & Controls (BAS/BMS) Contracting (IMAFALAE)

akta.pro secondary industry

Sustainable/Green Building & LEED Consulting (BPAHAKAG)

Keywords

• Building equipment engineering
• Electrical construction services
• HVAC installation
• Cleanroom systems
• Regenerative medicine facilities

Headquarters

HQ city

Osaka

HQ country

Japan

HQ region

Asia

Offices13 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Air Conditioning and Plumbing/Sanitation Construction (空調衛生工事): Core revenue-generating business providing HVAC and plumbing installation services for commercial buildings, industrial plants, data centers, semiconductor factories, and healthcare facilities. Serves as the foundational revenue pillar under the Mid-Term Management Plan Phase2.
2. Electrical Installation Construction (電気工事): Electrical equipment installation services including power distribution, lighting systems, and special high-voltage electrical work. Identified as a transforming business segment with focused hiring of electrical engineers and expanded large-scale project portfolio.
3. Overseas Construction Business (海外事業): International building equipment engineering projects under the same service categories as domestic operations. Growth-driven segment with emphasis on project scale expansion and risk management.
4. Regenerative Medicine Business (再生医療事業): Cell manufacturing and processing services for cancer immunotherapy and other cell-based treatments, provided through subsidiary Cerabo Healthcare Service. Contract manufacturing for pharmaceutical companies and cell production for private medical applications.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

Dai-Dan is a comprehensive building equipment engineering contractor that designs, installs, and maintains electrical, HVAC (air-conditioning and ventilation), and plumbing/sanitation systems for large-scale commercial, industrial, healthcare, data center, and semiconductor facilities in Japan. The company also delivers specialized cleanroom and regenerative medicine infrastructure, ZEB (Zero Energy Building) solutions, and proprietary environmental technologies through its subsidiary Cerabo Healthcare Service.

Product overview

Dai-Dan is an integrated facility equipment construction company providing comprehensive building systems including air conditioning, electrical, plumbing, and sanitation engineering. The company operates across four main business segments: air conditioning/sanitation construction (core revenue base), electrical construction, overseas operations, and regenerative medicine. The product portfolio centers on ZEB (Zero Energy Building) solutions through the Enefis® brand (Hokkaido, Shikoku, Kyushu), building environment optimization via REMOVIS® cloud-based monitoring, and specialized healthcare/cleanroom systems including Air Barrier Booth®, All-in-One CP Unit®, and Lami Flow Rack System® for regenerative medicine facilities. Supporting solutions include energy management (Flow Smart®), air quality control (Virtual Duct Cleanroom System®, Barrier Smart®), and digital construction tools (CV4D®, MonoBooker®). The company also operates in the regenerative medicine space through subsidiary Cerabo Healthcare Service with cell processing facilities and air filter regeneration using supercritical CO2 technology.

Differentiator

Problem solved

Functional benefit

Brands

• CellaBo Healthcare Service (セラボヘルスケアサービス): Subsidiary promoting regenerative medicine business including equipment development, sales, and facility consulting
• ZEB Buildings (enefice series)
• REMOVIS® (リモビス)
• CV4D® (Construction Visualizer 4D®)
• CellaBo (セラボ)

Products and services

• Air Conditioning and Plumbing/Sanitation Construction (空調衛生工事) Design and installation of HVAC, ventilation, and plumbing systems for commercial, industrial, and healthcare facilities. Core revenue-generating service.
• Electrical Installation Construction (電気工事) Power distribution, lighting, and special high-voltage electrical installation services for large-scale construction projects.
• Overseas Construction Business (海外事業) International building equipment engineering for HVAC, electrical, and plumbing projects outside Japan, primarily through Dai-Dan Thailand and Southeast Asia.
• Regenerative Medicine Cell Processing Services (Cerabo Healthcare Service) Contract cell manufacturing and processing services for cancer immunotherapy and other cell-based therapies, provided through Cerabo Tonomachi and Cerabo Haneda cell processing facilities.
• Air Barrier Booth® (エアバリアブース®) Doorless clean booth system for contamination-free clean environments using downward airflow and HEPA filtration, used in cleanroom and GMP facilities.
• REMOVIS® (リモビス®) Cloud-based building equipment monitoring and management solution using IoT for remote monitoring, energy analysis, and multi-user information sharing.
• Flow Smart® (フロースマート®) Variable flow pump control product for HVAC systems that reduces pump power consumption by 60-90% by matching flow to demand.
• All-in-One CP Unit® (オールインワンCPユニット®) Compact self-contained cleanroom unit for cell processing facilities; ductless design enables 10-day installation in limited spaces.
• Virtual Duct Cleanroom System® (バーチャルダクトクリーンルームシステム®) Ductless cleanroom HVAC system for Class 6-8 cleanrooms using partial airflow outlets, achieving uniform cleanliness at lower cost than ceiling duct systems.
• Barrier Smart® (バリアスマート®) Room pressure control system for cleanrooms and pharmaceutical facilities, maintaining pressure stability against door openings and external disturbances.
• WIT WET® (ウィットウェット®) High-precision evaporative humidification system with ±2% RH control accuracy, reducing operating costs vs steam humidification.
• Air Filter Regeneration Service (エアプリレート再生) Regeneration service for organic gas removal air filters using supercritical CO2 technology; reduces filter replacement cost to 30% of new filters.
• CV4D® (Construction Visualizer 4D®) 360-degree camera-based 3D site documentation service enabling remote site inspection, dimension measurement, and planning simulation.
• MonoBooker® (モノブッカー®) IoT-based construction equipment and aerial work vehicle location and reservation management service with cloud platform.
• Ultra-Low Dew Point Dehumidification System (超低露点室向け省エネルギー除湿システム) Energy-saving dehumidification system for ultra-low dew point environments (e.g. battery plants) reducing power consumption by up to 35%.
• ZEB Solutions / Enefis® Zero Energy Building Services ZEB planning, design, consulting, and construction services for net-zero energy buildings, including the Enefis® showcase facilities (Hokkaido, Shikoku, Kyushu).
• Hot Cure® (ほっとキュア®) Infection Patient Room Specialized positive-pressure isolation patient room for immunocompromised patients with ISO Class 5/6+ cleanliness and warm interior design.

Quantifiable outcome

• Flow Smart reduces HVAC pump power consumption by approximately 60-90%
• +4 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability6 records

Feature16 records

Partnerships

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

• Cerabo Healthcare Service Co., Ltd. (セラボヘルスケアサービス株式会社)coreStrategic or Co-development Partner · 1 April 2020Wholly-owned subsidiary established in April 2020 as the primary operating entity for Dai-Dan's regenerative medicine business. Operates Cerabo Tonomachi cell processing facility and Cerabo Haneda compact CPF, providing cell manufacturing services, facility consulting, and sales of regenerative medicine-related equipment developed by Dai-Dan.
• Tohoku University (東北大学)coreStrategic or Co-development PartnerJoint research partner in developing the supercritical CO2 air filter regeneration technology. The technology was jointly developed with Tohoku University and the National Institute of Advanced Industrial Science and Technology (AIST).
• National Institute of Advanced Industrial Science and Technology / AIST (産業技術総合研究所)coreStrategic or Co-development PartnerJoint research partner with Tohoku University in developing the supercritical CO2 air filter regeneration technology. The technology was recognized as a NEDO Innovation Practical Application subsidy project in fiscal 2008.
• Fujita University / Fujita Health University Tokyo Advanced Medical Research Center (藤田医科大学東京 先端医療研究センター)flagshipStrategic or Co-development PartnerCo-location partnership establishing Cerabo Haneda compact cell processing facility within the university's medical research center. The facility serves as both a cell manufacturing site and a showroom where visitors can observe cell manipulation operations. Located in the Hano-da area across the Tamagawa River from Tonomachi.
• Life Innovation Center (LIC) / King Skyfront (川崎市殿町地区 ライフイノベーションセンター / キングスカイフロント)coreStrategic or Co-development PartnerCerabo Tonomachi is located within the Life Innovation Center in the Tonomachi district of Kawasaki, part of the King Skyfront international strategic zone. This area is a cluster of cutting-edge life science research institutions and companies, supporting open innovation in regenerative and cell medicine.
• Microsoft Japan (日本 microsoft株式会社)coreTechnology or IntegrationProvider of Azure OpenAI Service platform powering Dai-Dan's proprietary generative AI 'Daidan AI Chat' for internal business use including idea generation, document summarization, document review, and proposal improvement. The AI will be linked with internal construction data and intellectual property for knowledge management.
• Kanazawa City / Kanazawa SDGs Initiative (金沢市 / 金沢SDGs)minorStrategic or Co-development PartnerHokuriku Branch reconstruction project participates in Kanazawa City's SDG future city planning initiative 'IMAGINE KANAZAWA 2030.' The project contributed to the city's sustainability goals through building design incorporating traditional architecture and environmental technology.
• Kanazawa University of Art and Design (金沢美術工芸大学)minorStrategic or Co-development PartnerCollaborated with Kanazawa University of Art and Design on the construction site enclosure design for the Hokuriku Branch reconstruction project, integrating traditional crafts into the temporary construction barrier.
• Construction Partner Companies (協力会社)coreChannel Partner/ Reseller/ DistributorNetwork of partner companies providing skilled labor for construction projects. Dai-Dan operates a 'Partner Company Window' (協力会社の窓) online portal and a Meister certification system recognizing outstanding foremen. As of 2025, 57 Meisters have been certified across 5 trade categories (electrical, duct, piping, refrigeration, insulation).
• Obayashi Corporation (株式会社大林組)coreChannel Partner/ Reseller/ DistributorGeneral contractor for the Teraru Corporation ZEB new office building project where Dai-Dan served as HVAC and plumbing subcontractor.
• Meiwa Co., Ltd. (株式会社明和，工務店)coreChannel Partner/ Reseller/ DistributorGeneral contractor for the Kobe Eye Center construction project where Dai-Dan served as HVAC and plumbing subcontractor for the world's first iPS cell-based clinical research facility.
• Nankai Building Service Co., Ltd. (南海ビルサービス株式会社)coreChannel Partner/ Reseller/ DistributorClient for special high-voltage electrical equipment renovation at the Nankai Terminal Building complex, where Dai-Dan performed electrical equipment installation work as a specialist subcontractor.
• Presico Engrg (プレしきしお)minorStrategic or Co-development PartnerOverseas engineering company that became a consolidated subsidiary in FY2025 March through additional share acquisition. Previously an equity-method affiliate.

Scale indicators23 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Takasago Thermal Engineering: Takasago Thermal Engineering (TYO:1969) is the most direct peer to Dai-Dan, providing HVAC, plumbing, and electrical installation services for commercial and industrial buildings across Japan. Both firms compete in similar specialty MEP subcontracting with comparable customer segments including semiconductor and data center facilities.
• Sanki Engineering: Sanki Engineering (TYO:1961) is a leading Japanese building equipment engineering firm specializing in HVAC, plumbing, and electrical systems for industrial, commercial, and cleanroom facilities. Direct competitor to Dai-Dan in MEP construction services with similar end-markets.
• Kandenko: Kandenko (TYO:1942) is one of Japan's largest electrical equipment installation contractors, operating alongside Dai-Dan's electrical work segment. Comparable in serving large commercial, industrial, and infrastructure projects with electrical installation expertise.
• Taikisha: Taikisha (TYO:1979) is a Japanese specialty contractor focused on industrial HVAC, cleanroom construction, and paint finishing systems. Particularly relevant for Dai-Dan's industrial cleanroom and semiconductor facility business, with strong overlap in automotive and electronics factory projects.
• Kyudenko: Kyudenko (TYO:1959) is a major Japanese electrical construction company with overlapping capabilities in electrical installation services. Comparable in project delivery for commercial buildings, industrial facilities, and infrastructure work.
• Toko Electrical Construction: Toko Electrical Construction (TYO:1946) is a Japanese electrical installation contractor serving commercial and industrial building projects. Overlaps with Dai-Dan's electrical construction business for large-scale facilities.
• Yurtec: Yurtec (TYO:1934) is a Japanese electrical and telecommunications infrastructure contractor. Competes with Dai-Dan's electrical installation segment for commercial and industrial facility projects across Japan.

Broad incumbents

• Kajima Corporation: Kajima Corporation (TYO:1812) is a leading Japanese general contractor with extensive commercial, industrial, and infrastructure construction capabilities. Competes in the broader nonresidential construction market where Dai-Dan provides specialty MEP services.
• Obayashi Corporation: Obayashi Corporation (TYO:1802) is one of Japan's largest general contractors that regularly engages Dai-Dan as a specialty MEP subcontractor. Represents the customer side of Dai-Dan's value chain while operating in overlapping nonresidential construction market.
• Shimizu Corporation: Shimizu Corporation (TYO:1803) is a major Japanese general contractor with broad nonresidential building construction capabilities. Acts as a key general contractor customer of Dai-Dan while also having in-house capabilities for certain specialty MEP work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCZJpJkZ8XhQb5ZV5kO3Zv2A

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries5 records

Funding overview

Funding rounds

Investors

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

M&A

Investments2 records

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

Frequently asked questions about Dai-Dan