株式会社共和電業

What 株式会社共和電業 does

株式会社共和電業 (Kyowa Dengyo Co., Ltd.) is a privately held Japanese electrical equipment and construction services company founded on May 8, 1967, headquartered in Sendai, Miyagi Prefecture. The company manufactures, sells, rents, and services electrical infrastructure for construction sites, with a core product portfolio spanning outdoor cubicles (high-voltage receiving and transforming equipment, available in linked-type, galvanized, and compact 2400×1000×1550mm configurations), flicker compensation devices (both capacitor-type and active filter-type), low-voltage dry transformers, high-voltage starting panels (including 6KV 250KW units), distribution panels, LED pendant lights for underground/mine use, LED cylinder lights, and rental electric wires (high/low voltage CV cables and cab-tire cables). The business holds Miyagi Prefecture construction permits for general electrical and fire protection facility work, plus an antique dealer permit supporting used-equipment resale, and operates three physical locations (Sendai HQ, Tagajo sales office, Shichigahama equipment center) across the prefecture.

Revenue is generated through three streams: hardware sales (new and used equipment, with used units positioned for low price and short lead time), usage-based rental of temporary construction electrical equipment, and professional services covering design, installation, and construction consultation from the planning stage onward. Go-to-market is direct-to-customer with no channel partners, distributors, or marketing campaigns; inquiries are handled by head office staff via phone, FAX, and online contact form. The target customer is regional construction companies requiring temporary high-voltage power supply, distribution panels, cable rental, and flicker mitigation for on-site heavy equipment, primarily within the Tohoku region of Japan.

The company has approximately 10 employees, ¥25,000,000 in registered capital, no parent or subsidiary entities, no disclosed external funding, and no AI, software, or digital platform component to its offering. Operations have been geographically concentrated in Miyagi Prefecture since founding, with no disclosed expansion into adjacent regions, new verticals, or international markets.

Name

株式会社共和電業

Legal name

株式会社共和電業

Website

https://kyowa-d.com

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

1–10 employees

Short description

Kyowa Dengyo Co., Ltd. is a privately held Japanese electrical equipment company founded in 1967 that manufactures, rents, and services construction-site power distribution equipment — including cubicles, distribution panels, transformers, flicker compensation devices, and cables — for construction companies in Miyagi Prefecture, Tohoku region.

Ownership category

akta.pro rank

Product category

Electrical Power Distribution Equipment

NAICS

Electrical Contractors and Other Wiring Installation Contractors (23821), Switchgear and Switchboard Apparatus Manufacturing (335313), Power, Distribution, and Specialty Transformer Manufacturing (335311), Other Electrical Equipment and Component Manufacturing (3359)

SIC

Electrical Work (1731), Switchgear & Switchboard Apparatus (3613), Power, Distribution & Specialty Transformers (3612), Services-Miscellaneous Equipment Rental & Leasing (7350)

akta.pro primary industry

Electrical Contracting & Wiring (IMAFALAA)

akta.pro secondary industries

Power Transformers, Reactors & Auxiliary Power Systems (EUADACAJ), Switching Stations & Reactive Power Facilities (Capacitor Banks, SVC/STATCOM) (IMAFAHAH), Overhead Conductors & Transmission Cable (IMADAMAH), Industrial Power & Energy Equipment Rental/Leasing (Generators, Light Towers, Compressors) (TLABAFAG), Transmission & Distribution Line Equipment (Bushings, Insulators, Arresters, Conductors, Hardware) (IMAGAAAF)

Keywords

• Temporary electrical equipment
• Power distribution equipment
• Construction electrical services
• Cubicle manufacturing
• Electrical equipment rental

Headquarters

HQ city

Sendai (Miyagino Ward)

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations

Revenue model

1. Equipment Sales (New and Used): Sale of new and used electrical equipment including cubicles, distribution panels, transformers, and flicker compensation devices. Used equipment is offered at competitive prices with short lead times and finished preparation.
2. Equipment Rental: Rental of construction temporary electrical equipment including cubicles, distribution panels, wires, transformers, and lighting. Provides flexibility for short-term construction needs.
3. Design and Construction Services: Design, installation, and construction services for electrical equipment systems, including planning consultation from initial project stages through implementation.

Go-to-market motion1 record

Distribution channels1 record

Core offering

株式会社共和電業 manufactures, sells, and rents temporary electrical equipment used at construction sites, including high-voltage cubicles (キュービクル), distribution panels, flicker compensation devices, transformers, and wiring materials. The company also provides in-house electrical design and on-site construction services for these temporary power systems, serving building and civil engineering contractors primarily in the Miyagi and Tohoku regions of Japan.

Product overview

株式会社共和電業 is an electrical equipment and construction services company offering a portfolio of power distribution and electrical equipment products and services. Core products include outdoor cubicles (屋外キュービクル) in various specifications including linked type and compact models, flicker compensation devices (フリッカ補償装置) in both capacitor and active filter types, distribution panels (分電盤), low voltage dry transformers (低圧乾式トランス), and high voltage starting panels. Services include manufacturing, used equipment sales, rental, design, and construction for construction temporary electrical equipment including high-voltage receiving equipment, distribution panels, and electric wire cables. The company operates from headquarters in Sendai with a sales office in Tagajo and an equipment center in Shichigahama, serving construction sites in the Tohoku region.

Differentiator

Problem solved

Functional benefit

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Scale indicators3 records

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• Kanamoto Co., Ltd. Major Japanese construction equipment rental company offering temporary power equipment and site utilities alongside general machinery rentals. Comparable to Kyowa Dengyo's rental business on a national scale; both serve construction site electrical needs.
• Kandenko Co., Ltd. One of Japan's largest electrical contractors with nationwide coverage in power infrastructure, building electrical, and information & communications work. Both firms install cubicles, distribution panels, and high-voltage receiving equipment for construction sites, but Kandenko operates at vastly larger scale across Japan while Kyowa Dengyo is regionally concentrated in Miyagi.
• Kyudenko Corporation: Major Kyushu-based electrical and HVAC contractor with national reach, performing electrical equipment installation, transformer and switchgear work, and design-construction for industrial and construction clients. Comparable to Kyowa Dengyo in offering design-through-installation electrical contracting for construction sites, but at national scale.
• Nishio Rent All Co., Ltd. Japan's largest construction equipment rental company with extensive inventory of temporary power equipment, distribution panels, and cables rented to construction sites nationwide. Overlaps directly with Kyowa Dengyo's rental of temporary distribution panels, wires, and transformers, but at a national scale with a much larger fleet.
• SWCC Showa Holdings (formerly Showa Electric Wire & Cable): Japanese manufacturer of electrical cables including CV cables and specialty cables used in construction and industrial applications. Comparable to Kyowa Dengyo's CV cable and cab-tire cable rental offerings, though SWCC operates at national manufacturing scale.
• Toshiba Transmission & Distribution Systems (Toshiba Energy Systems): Major Japanese manufacturer of power and distribution transformers, switchgear, and cubicle systems used in substations and on construction sites. Kyowa Dengyo sources/distributes comparable products and manufactures custom cubicles; both operate in transformers and switchgear for the Japanese market.
• Kinden Corporation: One of the leading Japanese comprehensive electrical construction firms, offering electrical equipment installation including cubicles, transformers, distribution panels, and power systems for buildings and infrastructure. National scope contrasts with Kyowa Dengyo's regional concentration, but the core offerings overlap directly.

Regional players

• Nippon Densetsu Kogyo Co., Ltd. Electrical infrastructure contractor with strong presence in the Tohoku region (Kyowa Dengyo's home territory), performing railway electrification, power equipment installation, and construction electrical work. Direct geographic overlap and similar core services, but broader infrastructure scope.

Emerging players

• Dai Nippon Engineering Co., Ltd. Japanese engineering firm providing electrical design, switchgear/cubicle integration, and power systems for industrial customers. Comparable to Kyowa Dengyo's design-plus-construction model for cubicles and temporary power systems, though typically larger in scope.

Others

• Tohoku Electric Power Company, Inc. The regional utility serving Kyowa Dengyo's geographic market and a key counterparty in the high-voltage receiving and flicker compensation work the company performs. Included as a customer/ecosystem participant rather than a competitor, but a critical stakeholder for grid-connected equipment the company installs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

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Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

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 株式会社共和電業