ABOUT US

Message from President

Yoshimasa Sawamoto, President & CEO
Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd.

Connecting Clean, Healthy Communities to the Future

We are a comprehensive engineering company with significant capabilities in plant construction, operation, maintenance, and business management, applying a wide variety of advanced technologies centered on the environmental field. We strive to protect the living environment and support the “clean, healthy communities of society”. Ensuring future generations can benefit from these “community norms” is our important mission.

The environment has no borders. Challenges surrounding the environment and resource circulation are becoming increasingly complex, and the technologies and services required are evolving significantly. As we expand our business beyond Japan to other nations around the globe, we will leverage the overall capabilities of the Mitsubishi Heavy Industries Group to create new technologies, products, and business outcomes, and contribute to the protection of our beautiful planet.

We will not be satisfied with the status quo. We will continue to anticipate the values required by future society and take on new challenges to deliver lasting value, contributing to enrich the lives of the next generation.

Corporate Overview

Name of the Company Mitsubishi Heavy Industries Environmental & Chemical Engineering Co.,Ltd.
Founding February 2, 1976
Business & Products Basic Planning, Development, Consulting, Designing, Construction, Installation, Sales & Operation & Maintenance on the following products;
Air Pollution Control Equipment. Water Pollution Control Equipment, Municipal Solid Waste (MSW) Treatment System, Heat Recovery Equipment, Sludge Treatment System, Waste Recycling Equipment, Vacuum-Sealed MSW Conveyance System, MSW Transship System (to reduce the volume of the garbage brought from resident, whose final destination will be landfill), Crusher, Dryer, Electrochlorination System, Biomass Gasification & Carbonization Plant and other relative Environmental Equipment
ISO Main Office ISO 9001 and ISO 14001
Branch Offices ISO 9001
General Administration Division Yokohama Blue Avenue Bldg., 4-4-2, Minatomirai, Nishi-ku Yokohama, Kanagawa 220-0012, Japan
Tel: +81-45-227-1280
Capital 3,450 Million Yen (As of March 31, 2026)
Sales (per year) 55,405 Million Yen (April 1, 2024 - March 31, 2025)
Employees 680 (As of April 1, 2026)
CEO Yoshimasa Sawamoto

Head Office

Yokohama (Yokohama Blue Avenue Building)

Map(Yokohama Head Office)
Map
Access by JR Lines From Yokohama station, East Exit: 15-minute walk
Access by Subway Lines
  • ・From Minatomirai Line, Shin-Takashima station, No.3 Exit: 3-minute walk
  • ・From Yokohama Municipal Subway Blue Line, Takashimachō station, No.2 Exit: 15-minute walk
By taxi
  • ・5 minutes from Yokohama station
  • ・30 minutes from Shin-Yokohama station
  • ・20 minutes from Haneda airport
From the airport to Yokohama
  • ・30 minutes from Haneda Airport to Yokohama station by train
  • ・50 minutes from Haneda Airport to YCAT by limousine bus
  • ・90 minutes from Narita Airport to Yokohama station by train
  • ・110 minutes from Narita Airport to YCAT by limousine bus

History

Mitsubishi Heavy Industries Environmental Engineering Co., Ltd. (MJK)

1976 Jyuko Kankyo Service Co., Ltd was founded specialized for the maintenance and after sales service work on environmental equipment of Mitsubishi Heavy Industries, Ltd. (MHI)
1987 The name is changed to Mitsubishi Heavy Industries Environmental Engineering Co., Ltd. (MJK)
2006 MHI has transferred the business of sludge treatment plant to MJK
2008 MHI has transferred the business of waste treatment plant to MJK

Mitsubishi Heavy Industries Environmental and Chemical Engineering Co., Ltd. (MHIEC)

2009 New company is founded and named Mitsubishi Heavy Industries Environmental and Chemical Engineering Co., Ltd. (MHIEC)
by a merger of two companies of MJK and REC
2012 The petroleum and chemical plant operations are split up and transferred to Mitsubishi Hitachi Power Systems Engineering Co., Ltd. under the group-wide business reorganization of MHI.
2016 The fuel gas desulfurization plant operations are split up and transferred to Mitsubishi Hitachi Power Systems Environmental Solutions, Ltd. under the group-wide business reorganization of MHI.

Corporate Organization

As of April 1. 2026

Our Principles

  • We deliver reliable and innovative solutions that make a lasting difference to customers and communities worldwide.
  • We act with integrity and fairness, always respecting others.
  • We constantly strive for excellence in our operations and technology, building on a wide global outlook and deep local insights.

Sustainability

MHI Group Global Code of Conduct

Please click lower pdf. Our MHI Group Global Code of Conduct.