We at Yuko-Keiso solve our clients’ problems for tomorrow with reliable control and advanced information technologies.

Ryuzo Ota Yuko-Keiso Co., LTD.

Founded in 1963, we have been designing, installing, and maintaining automated control systems for electrical systems, air conditioning, and security systems chiefly in office buildings. Our engineers have a strong work ethic that has earned the trust of our many clients. We believe that our success comes from a deep understanding of our clients’ professional needs and, through our instrumentation, our ability to make their clients and customers happy.

  We are confident that we can realize significant energy-saving measures with the know-how and advanced technologies that we have developed through our work on all kinds of building control systems. In fact, as of 2012 we have put these measures into effect via our participation in the JCM Model Projects in Vietnam.

  We have unique technologies that we have developed in the markets that we have cultivated over the years. Applying those technologies to compete in different fields and against different companies, we have leveraged the technologies we have spent years perfecting, and as a result, we have been successful in planting seeds in new markets.

  We will continue to work hard with speed and flexibility to create environments that optimally meet our clients’ needs, combining the latest technologies with our wealth of knowledge and experience.


Ryuzo Ota

Representative Director,

Yuko-Keiso Co.,Ltd.


Creating optimum environments that are beneficial to people, society, and the natural environment

Corporate mission

  • With abundant creativity and cutting-edge technologies, we give back to society by creating optimum environments that are beneficial to people, society, and the natural environment.


Management attitude 

  1. We take prompt action as a team to respond to the changing needs of our clients.
  2. We place a high priority on safety and up-to-date technologies, and through tireless effort
    and technological innovation, we offer our clients products of the highest quality.
  3. As part of our efforts to maintain client trust, we also place much emphasis on compliance.
  4. We strive to build a strong business foundation and a company that is attractive to clients, shareholders,  and employees.
  5. We strive to be a profitable company full of vitality and growth in which all employees feel a sense of reward and pride.


1963 DecYuko-Keiso established at 1-38 Yoyogi, Shibuya, Tokyo
1967 JulCompany head office relocated to 1-46-10 Tomigaya, Shibuya, with relocation of company building
1973 DecCompany head office relocated to 5-11-9 Yoyogi, Shibuya, with relocation of company building  Yamatake Honeywell (Current Azbil Corporation) Distributor
1982 JunOpened Oyama Sales Office in Oyama City, Tochigi (Current Tochigi Sales Office)
1985 MayOpened Saitama Sales Office in Omiya City, Saitama
1988 AugOpened Yokohama Sales Office in the Kanagawa District of Yokohama City, Kanagawa
1989 JunOyama sales office renamed Tochigi sales office upon office relocation (Kawachi county, Tochigi)
2000 NovCompany head office relocated to 2-8-8 Chuo, Meguro, Tokyo with purchase of new company building (Current company head office)
2007 OctCertified as a CO2-reducing SMEs by the Ministry of Economy, Trade and Industry
2009 MarEstablished Office of Registered Architect First Class
2012 JulyEstablished Yuko-Vietnam in Hanoi, Vietnam
2013 Dec50th anniversary of establishment