Company

Company

会社概要

We founded the company in 1997 as an air conditioning and ventilation contractor. Today we take on electrical work and mechanical work together as a single contract, under Special Construction Business Licenses for both pipe work and electrical work.

Message

Our message

私たちから

To everyone who has taken an interest in our company: let us tell you a little about what matters to us.

From the customer’s point of view,
to be Japan’s number-one building services contractor.

It started with a single vehicle.

SOWA SERVICE started in 1997 with air conditioning skills and a single vehicle. We go to our customers and provide service on site. That is still where we come from.

We go where we are called and finish each job we are given, one at a time. Through that repetition, we have kept learning the right knowledge and methods for customers we have not yet met.

What a large job site taught us.

The turning point was the renovation of a large shopping center in Shiga, with a total floor area of about 100,000 m². We were entrusted with all of the air conditioning, ventilation and smoke exhaust ductwork, a project on a scale we had never handled before.

To be honest, we had our doubts. But on the job site, we, and the contractors working with us, were all there because we had been chosen. So we decided to do everything we could. That decision has made us who we are today.

Inside the ceiling, on the drawings, during test runs: we stop and ask, “Is this really right?” We share what we notice and redo the work when needed. Work finished this way has led to the next request.

The easy road is usually the long way around.

If we choose the easy way, the extra work comes back to us later. So when in doubt, we choose the way that takes a little more effort. Standardizing procedures and making rules are how we build a footing to keep doing good work tomorrow.

Each time a customer asked, “Could you also help with this?”, we were able to do a little more. Today, we believe we have become a company people come to first for building services work.

We care about the work, so we go into the details.

There are three phrases we hold on to. Never let the work become dull. Give each day your best. If something seems wrong, speak up. Because we love this work, we notice the small details. We want to build carefully, even the parts our customers will never see.

So that customers say, “We want you to do it.”

Our goal is to be “Japan’s number-one building services contractor, from the customer’s point of view.” But we do not think number one is something you can call yourself. It means hearing a customer say, “We want to ask you.” For those words, we will keep giving our full attention to each job site.

SOWA SERVICE Co., Ltd.All of our staff

Two technicians in helmets working on an air handling unit in a machine room

Profile

Company information

会社情報

Licenses and registrations are listed exactly as issued, so you can check them before doing business with us.

Company name
SOWA SERVICE Co., Ltd.
“SOWA” comes from the characters 崇 (SO) and 和 (WA) in the name of our founder, Takashi Wago.
Founded
April 1997
Incorporated
2005: Incorporated as a limited company (yugen kaisha)
October 2017: Reorganized as a stock company (kabushiki kaisha)
Representative
Takashi Wago, President and Representative Director
Capital
50 million yen
Employees
More than ten
Head Office
4-18-21 Minami-Aoyama, Minato-ku, Tokyo 107-0062
Moved here in August 2026
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
Phone
+81-3-6434-9201
Services
  • Sales of equipment and electrical materials (lighting fixtures, wiring devices, air conditioning equipment, sanitary fixtures, fire safety equipment, etc.)
  • Permits and notifications required for construction (such as notices of commencement)
  • Installation and construction management for all kinds of building services work (main areas: electrical work and mechanical work)
    Mechanical work includes air conditioning, ventilation (ductwork), plumbing, gas, and fire and life safety systems
  • Maintenance and repair of equipment (inspection, cleaning, repair and replacement)
Licenses and registrations
  • Special Construction Business License for pipe work (December 2016)
  • Special Construction Business License for electrical work (April 2018)
  • Governor of Aichi Prefecture No. 107237
  • Registered electrical contractor
  • Registered Class 1 fluorocarbon filling and recovery operator (Tokyo)
Group
SOWA Group(Parent company: SOWA HOLDINGS Co., Ltd.)

Offices

Locations

拠点

From our two locations in Tokyo and Nagoya, we serve job sites in the Greater Tokyo and Chubu regions and across Japan.

Based in Tokyo and Nagoya, we have carried out work in about 20 prefectures across Japan.Prefectures where we have worked

Philosophy

Philosophy and code of conduct

理念・行動指針

The ideas that our company and group value.

Our Belief

Unless we are truly committed,
we cannot make our customers happy.

From our company brochure

Group Philosophy

We help people build “a rich life” through their work.

SOWA Group philosophy (from our company brochure)

Code of conduct

01

Higher quality

02

Lower costs

03

Shorter lead times

04

Better proposals

How we put our code of conduct into practice on every job

History

History

沿革

Starting with air conditioning and ventilation, we moved into plumbing and then electrical work, expanding the range and scale of our work step by step.

  1. Founded

    Takashi Wago founded the company as an air conditioning and ventilation contractor.

  2. Incorporated as a limited company

  3. Obtained a General Construction Business License for pipe work

  4. Opened the equipment sales department

    Able to handle everything from equipment and materials sales to installation.

  5. Won a positive pressure system contract for nuclear emergency off-site centers

    Handled fabrication, delivery and construction management of positive pressure systems at four nuclear emergency off-site centers in Fukui Prefecture.

  6. Introduced 3D CAD

    Set up a system for 3D shop drawings and coordination studies.

  7. Opened the plumbing department

    Began taking on hotel and hospital projects.

  8. Won a full contract for a large shopping center

    Won a full contract for air conditioning and fire and life safety (smoke control) work in a large shopping center in Shiga Prefecture (total floor area about 100,000 m²).

  9. Opened the Tokyo Sales Office

  10. Began taking on electrical work in earnest

  11. Increased capital to 50 million yen

  12. Obtained a Special Construction Business License for pipe work

  13. Moved to a holding company structure

    Became part of the SOWA HOLDINGS Co., Ltd. group.

  14. Reorganized as a stock company (kabushiki kaisha)

    Became SOWA SERVICE Co., Ltd.

  15. Obtained a Special Construction Business License for electrical work

    Able to take on pipe and electrical work together under Special Construction Business Licenses for both.

  16. Won a full air conditioning contract for a shopping mall in Hiroshima City

    Took on all air conditioning work in a new shopping mall with about 30 tenants.

  17. Full renovation of a hotel

    Full renovation of the air conditioning and electrical systems of a hotel in Kariya, Aichi.

  18. Started business in Tokyo

  19. Moved the Head Office to Minami-Aoyama, Tokyo

SOWA Group

SOWA Group

SOWAグループ

The SOWA Group consists of the following four companies.

SOWA HOLDINGS Co., Ltd.Operating holding company (parent company)
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SOWA SERVICE Co., Ltd. (this company)Building services contracting (electrical work and mechanical work, equipment and materials sales, permits and applications, maintenance and repair)
SEDSBuilding services design
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KD WORK Co., Ltd.Electrical work specialist
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Building services design is done together with SEDS, our group company.

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