Corporate Overview

Company name


English Name


Main Business Activities

We offer various services, such as the design and construction of facilities for water treatment plants, sewage treatment plants, and waste treatment facilities; the design, manufacture, and sale of various equipment; repair work; and operation management.

Construction Industry Qualifications

Civil engineering works, building works, electrical works, plumbing works, tile, brick and block works, machine and equipment works, telecommunications works, water and sewerage works, and sanitation facilities works

Date of Establishment

April 01, 2008


Kenji Yamaguchi, President and Representative Director

Key Management Indicators

Consolidated net sales: 135.557 billion yen
Consolidated ordinary income: 8,751 million yen

Learn more

  • Head Office
    JR Kanda Manseibashi Bldg.
    1-25 Kandasuda-cho, Chiyoda-ku, Tokyo
    Phone: 03-6853-7300

  • Hino Branch
    3-1-30 Asahigaoka, Hino-shi, Tokyo
    Phone: 042-589-6900

  • Nagoya Branch
    Nagoya Prime Central Tower
    2-27-8 Meieki, Nishi-ku, Nagoya, Aichi
    Phone: 052-856-1300

  • Main Sales Offices
    Tokyo (Head Office), Sapporo, Sendai, Yokohama, Nagoya, Osaka, Hiroshima, Takamatsu, Fukuoka

Development Base
(R&D Center)

Handa, Aichi; Ichihara, Chiba; Chiyoda-ku, Tokyo

Overseas Offices

U.S.A., Netherlands, Switzerland, Germany, Vietnam, Cambodia

Number of employees

3,565 *Consolidated as of March 31, 2023

Main Group Companies
Stock Exchange Listing/Securities Code

TSE Prime Market Category
Industry Classification Code: Electricity and Gas 9551

Major shareholders
Fiscal year end

March 31

Minimum trading unit


Areas of operation and value creation

We operate businesses designed to develop, renew, and maintain water and environmental infrastructure while fulfilling our corporate social responsibility through initiatives aimed at conserving water and the environment, raising awareness, aiding in disaster recovery, and more. We are committed to continuously contributing to local communities and society at large, as well as global environmental conservation, while enhancing our corporate value through these activities.

Business portfolio

Our operations consist of our plant engineering business, which focuses on engineering, procurement and construction (EPC) along with overseas projects, and our service solutions business, which focuses on operations and maintenance (O&M) along with public-private partnership (PPP) projects.