From the customer’s point of view, toward becoming Japan’s leading building services contractor.
Strong
in construction.
工事に、強い。
Electrical and mechanical work. New construction to large-scale renovation, homes to mixed-use facilities. Each person on the job site does the hands-on work, and we see every project through to the end.


Behind the Ceiling
Above this ceiling
is our work too.この天井の上も、私たちの仕事です。
Inside the ceiling, hidden once the building is finished, are the air conditioning, plumbing, electrical and fire safety systems.
01Air conditioning and ventilation
Ducts
Ducts carry air from the air conditioner to each room. They are supported inside the ceiling with hanging bolts and connected to the air outlets.
02Plumbing and air conditioning
Piping
Water supply and drainage piping, and refrigerant piping connected to the air conditioner. Drain pipes are sloped so that water flows.
03Electrical (main power lines, lighting, low-voltage systems)
Wires and cable trays
We bundle main power and low-voltage wiring on cable trays and deliver electricity to lighting and outlets.
04Fire and life safety
Fire and life safety
We also install fire and life safety systems, such as smoke control systems that vent smoke outside in a fire.
PhotoAn actual job site
The following are photos from actual job sites.
Rectangular ducts and cable trays hung inside the ceiling. Once finished, they are hidden behind the ceiling panels.
Whole BuildingA whole building
All the systems for a whole building, through one point of contact.
From the water tank in the basement to the outdoor units on the roof. We take on electrical and mechanical work as a single package, with Special Construction Business Licenses for pipe and electrical work.



Works
All building services work
設備工事全般
We handle a building's building services work through a single point of contact. Our main areas are electrical work and mechanical work. You do not need a separate contractor for each type of work.
01 / Electrical
Electrical work
Main power lines, distribution boards, lighting, outlets and power supply for equipment. We do this work under our Special Construction Business License for electrical work.
- Main power lines
- Distribution boards
- Lighting
- Outlets
02 / Mechanical
Mechanical work
We install piping and ductwork for air conditioning, plumbing, gas and more under our Special Construction Business License for pipe work.
- Air conditioning
- Ventilation and ductwork
- Plumbing
- Gas
- Fire and life safety
Range
Buildingtypes and sizes
建物の種類と規模
From whole-house air conditioning in homes to a shopping center with about 100,000 m² of floor area.
Building size
Types of work
Our Service
We build it,
and keep it running
つくって、動かし続ける
From proposing equipment to installation and maintenance after completion. One company takes responsibility for the entire life of your systems.
Equipment and materials sales
From electrical materials to air conditioning, sanitary and fire safety equipment, we propose products for building systems to suit the building and its use.
Permits and applications
We also handle the notifications and applications needed for construction, such as construction start notifications.
Installation
With our own tradespeople at the core, we work on site with partner contractors and complete everything from piping, ductwork and wiring to equipment installation.
Construction management
We manage schedule, quality and safety. With Special Construction Business Licenses for pipe and electrical work, we can also take on large projects as prime contractor.
Maintenance and repair
Regular inspection, cleaning, repair and replacement. We look after systems that must not stop.
For design, we work with the Group's design company. SOWA SERVICE focuses on building and maintaining.
From replacing air conditioners in stores to a single-contract project for a shopping center with about 100,000 m² of floor area and positive pressure systems for nuclear emergency off-site centers. Whatever the size or difficulty, we have built our experience one job site at a time.
We hold Special Construction Business Licenses for both pipe work and electrical work. We take on work that spans several trades without splitting it, and handle schedule coordination as one company.
Projects
Projects
施工実績
Starting with a new large electronics store where we handled all the electrical work, we present four featured projects: commercial facilities, public emergency facilities and electronics stores across Japan. Projects for hotels, hospitals and homes are in the project list.

New large electronics store(Tachikawa, Tokyo)
We received all the electrical work as a single contract and installed main power lines, distribution boards, sales floor lighting, outlets and low-voltage systems across five floors, while also handling air conditioning, plumbing and fire and life safety.
- Sales floor area
- About 6,400m²
- Floors
- 5floors
- Opened
- 2016

Large shopping center (Shiga)
Contract received in 2014. About 100,000 m² of total floor area; we handled air conditioning and fire safety (smoke control) as a single package.

Nuclear emergencyoff-site centers (Fukui)
Contract received in 2012. We built, delivered and managed the installation of positive pressure systems at four facilities, keeping outside air from getting in.

Renovation of electronics stores across Japan
From 2018 to 2019, we renovated the air conditioning and plumbing at a total of 17 stores.
People / Recruit
The people who work hard on site
are the face of this company.
現場で汗をかく人が、この会社の顔です。
First on the job site in the morning, the last to clean up and leave. Our work is supported by each of the tradespeople working on site. We are looking for site staff, foremen and construction managers (CM) to join us in building “Japan’s leading building services contractor.”
Air conditioner not working?
Water leaking?
Contact us first.
エアコンが効かない、水が漏れる。まずはご連絡ください。
We accept inquiries about inspection, repair and replacement. We also service systems installed by other companies.
Company
Company
会社概要
As the building services contractor of the SOWA Group, we operate from two locations: our Head Office in Minami-Aoyama, Tokyo, and our Nagoya Branch.
- Company name
- SOWA SERVICE Co., Ltd.
- Founded
- April 1997
- Representative
- Takashi Wago, President and Representative Director
- Capital
- 50 million yen
- Head Office
- 4-18-21 Minami-Aoyama, Minato-ku, Tokyo 107-0062
- Nagoya Branch
- 1-3-37 Koyo, Chikusa-ku, Nagoya, Aichi 464-0061
- Setagaya Warehouse
- Taishido, Setagaya-ku, Tokyo 154-0004
- Kugayama Dormitory
- Kugayama, Suginami-ku, Tokyo 168-0082
- Licenses
- Special Construction Business License for plumbing/HVAC (pipe) work and electrical work (Governor of Aichi Prefecture, No. 107237)
SOWA Group
Contact
Choose by topic
ご用件から選ぶ
A staff member will review your message and get back to you. For urgent breakdowns, please call us.
Estimate
Request drawings or a quotation
Building services work for new construction or renovation. You can attach drawings and site photos.
Request a quotationRepair
Inspection, repair and breakdowns
Air conditioning stopped, or a water leak? We also handle equipment installed by other companies.
Request a repairPartner
Partner contractor registration
We are looking for tradespeople and specialty contractors to build job sites with us.
Register