Standing on our own.
Each company earns its own way through its own specialty. We learned during hard times not to lean on any single company. Leave each job to its specialists: the deeper the expertise, the more often we are relied upon.
Connected side by side.
Design, HVAC and electrical colleagues gather around a single project. When people move between companies and share what they know, we can reach work too large for any one company alone.
Sowa Equipment
Design Studio Co., Ltd.
Building services design: HVAC, electrical and plumbingseds.jp ↗Where the group began. After many years of whole-house air conditioning for homes, it now handles HVAC and plumbing works, site management and equipment sales, for projects from shopping facilities to the offices of listed companies. It obtained a Special Construction Business License in 2018.
- Founded
- April 1997
- Capital
- ¥50 million
- President
- Takashi Wago
- Address
- 4-18-21 Minami-Aoyama, Minato-ku, Tokyo
- Tel
- +81-52-791-0863
Electrical and fire protection works, from general electrical systems to low-voltage, high-voltage power receiving, disaster prevention and communications.
- Founded
- January 2015
- Capital
- ¥5 million
- Address
- 1-3-37 Koyo, Chikusa-ku, Nagoya
- Tel
- +81-52-938-4126
Sowa Equipment
Design Studio Co., Ltd.
Building services design: HVAC, electrical and plumbing
seds.jp ↗The group’s building services design office. One team designs air, power and water together. It moved to Minami-Aoyama, Tokyo in 2026.
- Established
- 2017
- Capital
- ¥5 million
- Address
- 4-18-21 Minami-Aoyama, Minato-ku, Tokyo