DAIWAKENKO

What DAIWAKENKO does

DAIWAKENKO (大和建工株式会社, Daiwa Kenko Kabushiki Kaisha) is a privately held Japanese industrial equipment manufacturer founded in November 1965 and headquartered in Koto-ku, Tokyo, with 70 employees and ¥60 million in registered capital. The company specializes in hydraulic jack systems for excavation support — specifically its proprietary preload method — used to apply controlled axial force to struts in earth retention structures, preventing ground settlement and wall deformation during deep foundation and underground construction. Its two main product lines are (1) site temporary equipment, including preload jacks, reinforcement jacks (DWJ/DHJ series), low-profile jacks (LPJ series), GB-type backfill materials, custom-made hydraulic products up to 7500KN, and measurement instruments (PGB axial force meters and the MLIT-approved ST-COMM wireless IoT monitoring system), and (2) civil engineering testing machines, including pendulum-type slip resistance testers (DB-40, UK BSi-certified), Marshall stability testers, automatic compactors, soundproof enclosures, and biodegradable Eco Oil hydraulic fluid.

The business operates a hybrid revenue model combining equipment manufacturing and one-time sales, multi-year equipment leasing (especially for hydraulic jacks deployed on construction sites), and professional measurement/testing services such as axial force, slope, and earth pressure measurement. Go-to-market is sales-led B2B, targeting Japanese construction companies and public works contractors through nine domestic sales offices and equipment centers (Sapporo, Sendai, Nagoya, Osaka, Chugoku-Shikoku, Fukuoka, Chiba, Yokohama, plus Tokyo HQ) and one resident representative office in Hanoi, Vietnam (opened December 2011). The company's commercial reputation is anchored by ISO 9001:2015 certification (covering design, manufacturing, maintenance, and sales), 50+ years of operating history, and a track record with major enterprise clients including Chugoku Electric Power, Tokyo Electric Power, the National Diet Library, and Mitsubishi Bank, as well as infrastructure projects such as Haneda Airport access and subway construction.

Name

DAIWAKENKO

Legal name

大和建工株式会社

Website

https://daiwakenko.co.jp

Company type

Private

Founded year

1965

Operating status

Operating

Short description

DAIWAKENKO is a Japanese privately held manufacturer (founded 1965, 70 employees) that designs, builds, and leases hydraulic preload jacks for excavation support and civil engineering testing equipment, serving construction firms and public works contractors across Japan with nine domestic offices and one Vietnam representative office.

Ownership category

akta.pro rank

Product category

Construction Equipment Manufacturing

NAICS

Construction Machinery Manufacturing (333120), Testing Laboratories and Services (54138)

SIC

Construction Machinery & Equip (3531), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Specialized Lifting Systems (Hydraulic Gantries, Strand Jacks, Jacking Systems) (IMAHAJAO)

akta.pro secondary industry

Trench Safety & Shoring Equipment Rental/Leasing (TLABAFAI)

Keywords

• Hydraulic jacks
• Civil engineering testing
• Excavation support equipment
• Preload method systems
• Construction equipment manufacturing

Headquarters

HQ city

Koto-ku, Tokyo

HQ country

Japan

HQ region

Asia

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Equipment Manufacturing and Sales: Design, manufacture, and sale of hydraulic jacks, preload equipment, testing machines, and related construction equipment
2. Equipment Leasing: Rental and leasing of hydraulic jacks and construction equipment for excavation projects
3. Testing and Measurement Services: Providing measurement and testing services including axial force measurement, slope measurement, and earth pressure measurement for construction sites

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

DAIWAKENKO designs, manufactures, sells, and leases hydraulic jacks and civil engineering testing equipment for the Japanese construction industry. Core offerings include preload jacks and reinforcement jacks for excavation support, pendulum-type slip resistance testers for pavement safety testing, and IoT-enabled wireless strain monitoring systems (ST-COMM) approved by Japan's Ministry of Land, Infrastructure, Transport and Tourism. The company serves excavation contractors, civil engineering firms, and public works projects across Japan with both outright sales and multi-year equipment leasing options.

Product overview

DAIWAKENKO (大和建工株式会社) is a Japanese industrial equipment manufacturer specializing in hydraulic jacks and civil engineering testing machines. The company operates as a single-brand manufacturer with two core product lines: (1) 現場仮設備用機器 (Site Temporary Equipment) centered on hydraulic preload jacks for excavation support, including preload jacks, reinforcement jacks (DWJ/DHJ series), low-profile jacks (LPJ series), backfill materials (GB series), and measurement instruments (PGB axial force meters, ST-COMM wireless IoT monitoring system); and (2) 土木用試験機 (Civil Engineering Testing Equipment) for asphalt and pavement testing, including slip resistance testers (DB-40 pendulum type) and Marshall compactor accessories. The company also produces custom hydraulic products including Kiri Jacks (TS series), Universal Joints (TU series), and special large-capacity jacks up to 7500KN. Supporting products include wheeled aluminum cases for slip testers, soundproof enclosures for compactors, and biodegradable hydraulic oils (Eco Oil).

Differentiator

Problem solved

Functional benefit

Products and services

• Preload Jacks (プレロード用ジャッキ) Standard hydraulic preload jacks for excavation and earth retention construction, used to apply axial force to struts and maintain wall integrity during deep foundation work. Targeted at construction companies and excavation contractors.
• Preload Equipment / Universal Jacks (プレロード機材) Universal hydraulic jacks for preloading earth retention support structures, compatible with various H-beam sizes for excavation support applications. Sold and leased to construction contractors.
• GB-type Backfill Materials (裏込材 GB-02, GB-03) Wedge-type backfill materials (GB-02, GB-03) made of reinforced plastic and aluminum alloy for filling gaps between earth retention walls and support structures, reducing construction waste and costs compared to concrete rubble. Sold to excavation contractors.
• Reinforcement Jacks / Stiffener Jacks (補強ジャッキ DWJ/DHJ series)

Quantifiable outcome

• Successfully supported major infrastructure projects including Haneda Airport access, subway construction, and numerous pump station projects with hundreds of units supplied per site

Named customers6 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

Feature5 records

Partnerships

Three partnerships are on record, tiered core and minor.

• 株式会社大和製作所 (Daiwa Seisakusho)coreOthers · 2 November 1965Related company established in November 1981, involved in manufacturing operations for the Daiwakenko group
• 株式会社なごみエンタープライズ (Nagomi Enterprise)minorOthersRelated company within the Daiwakenko group structure
• 株式会社大和製作所 (Daiwa Seisakusho)coreOthersGroup company providing manufacturing capabilities, website link provided on quality certification page

Scale indicators4 records

Recent moves11 records

Expansion highlights5 records

Direct peers

• Enerpac: Enerpac is a global leader in high-force hydraulic tools including jacking systems, strand jacks, and synchronous lifting equipment for industrial and construction applications. Directly comparable to Daiwakenko's hydraulic jack portfolio, though Enerpac serves a broader international market.
• Holmatro: Holmatro designs and manufactures high-pressure hydraulic jacks, cylinders, and jacking systems for industrial, construction, and rescue applications. Closely comparable product set to Daiwakenko's preload and reinforcement jacks, with overlapping customer profiles in civil engineering.
• Nakamura Jico Co., Ltd. Nakamura Jico is a Japanese manufacturer of construction equipment including earth retention systems, jacks, and related accessories. Direct domestic peer with overlapping product categories in excavation support and Japanese contractor customer base.
• Tokyo Keiki Inc. Tokyo Keiki manufactures measurement and control instruments, including civil engineering testing machines and sensors used in construction quality control. Directly comparable to Daiwakenko's testing equipment line such as the Marshall stability testers and axial force meters.

Broad incumbents

• Kobelco Construction Machinery: Kobelco is a major Japanese and global manufacturer of excavators, cranes, and construction equipment. While not focused on small hydraulic jacks, it serves the same Japanese construction customer base and overlaps on worksite equipment used in excavation projects.
• Atlas Copco: Atlas Copco is a global industrial tools and equipment manufacturer with offerings spanning hydraulic bolting, jacking, and construction tools. A broad incumbent with overlapping capabilities in high-force tools and construction site equipment, though its portfolio is much wider than Daiwakenko's specialty focus.
• Hilti AG: Hilti is a global construction tools and services provider with a broad portfolio including measuring systems and jack-related products. Comparable on testing/measurement instrumentation and as a major brand sold to Japanese contractors, though it operates a much wider product and service portfolio.
• Furukawa Rock Drill: Furukawa Rock Drill is a Japanese manufacturer of drilling equipment and related construction machinery. While primarily focused on drilling rather than jacking, it serves a similar Japanese construction and civil engineering customer base with adjacent specialty equipment.

Others

• Stanley (UK slip resistance instruments): UK-based Stanley supplies pendulum slip resistance testers (the BSi-certified instruments that Daiwakenko distributes and services for the Japanese market). The companies are partners/affiliates rather than competitors, with Daiwakenko providing localized sales, calibration, and accessories (aluminum cases) for Stanley testers in Japan.

Emerging players

• Suncoh Consulting / Suncoh Group (Japanese geotechnical engineering firms): Specialized Japanese engineering contractors in geotechnical and excavation support work who purchase Daiwakenko's jack systems and monitoring equipment. They represent the typical buyer profile and a window into indirect competitive pressure from in-house capabilities being developed by major contractors.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 DAIWAKENKO