EnvironmentClimate Change

The Marubeni Group recognizes climate change as a global and highly urgent social issue, and identifies it as one of its Environmental and Social materiality. In March 2021 we released the Marubeni Long-Term Vision on Climate Change: Towards Net-Zero GHG Emissions and aim to transform the total environmental impact of its business activities to a positive one by contributing to low-carbon and decarbonization through our business activities while ourselves achieving net-zero GHG emissions.

Initiatives for Renewable Energy Power Projects

In order to work toward a low-carbon society that mitigates the effects of climate change as part of sustainable development goals, Marubeni is actively pursuing and expanding renewable energy power projects.*1

1Renewable energy power generation currently accounts for approximately 15% of our net generation capacity as of March 2021. We will increase this to approximately 20% by 2023.


For detailed information on renewable energy business in Japan, click here.

Initiatives for Micro-Scale Hydro-Power Generation Business

The Marubeni Group considers micro-scale hydro-power generation as an important business area, and has been conducting operations in this area through Group company, Mibugawa Electric Power Company since 2006. As this business utilizes natural energy sources, consideration for the environment is essential, and we are also actively working on reduction of waste materials, maintenance of water quality, conservation of energy and resources, and other environmental activities.

“Micro-scale hydro-power generation” is a term used to refer to small-scale hydropower generation operations with output of less than 1,000 kW. These operations do not require the use of dams or other facilities that entail large-scale construction projects, but rather generate power by utilizing streams or agricultural irrigation canals, thus minimizing the development footprint. The environmental impact on water quality and the water habitat is exceptionally low, and there is no impact on land features or scenic beauty. Once up and running, these operations emit almost no CO2, thereby offering benefits in terms of minimal impact on biodiversity and environmental conservation. Since it utilizes local water resources, it has the potential to be an effective technology to realize the production and consumption of local energy, which will be beneficial for the independent development of the region. Moreover, to develop a power plant that coexists with the local community, we are trying to realize the project with the understanding and cooperation of local organization and people concerned through holding events on the theme of environment for residents, inviting lecturers, and deepening understanding of the history of the planned site.

In addition to the Mibugawa Power Station, the Marubeni Group currently operates the following micro-hydro power generation facilities.

  • Producing power locally: Mibugawa Power Company
  • Micro-scale hydro-power station (Hokuto City, Yamanashi Prefecture)

Micro-Scale Hydro-Power Generation Facilities (as of March 2021)

Facility Location Approved Output
Mibugawa Power Station No. 1 Ina City, Nagano Prefecture 23,100kW
Mibugawa Power Station No. 2 10,800kW
Mibugawa Power Station No. 3 260kW
Mibugawa Power Station No. 4 480kW
Tateshina Power Station Chino City, Nagano Prefecture 260kW
Tateshina Power Station No. 2 141kW
Tateshina Power Station No. 3 93kW
Tateshina Power Station No. 4 145kW
Shinmiyagawa Power Station Komagane City, Nagano Prefecture 195kW
Hokuto Nishizawa Power Station Hokuto City, Yamanashi Prefecture 220kW
Hokuto Kagoishi Power Station 230kW
Hokuto Kurabara Power Station 200kW
Honmonji Power Station No.1 Fujinomiya City, Shizuoka Prefecture 120kW
Honmonji Power Station No.2 140kW
Shiroishi Power Station Shiroishi City, Miyagi Prefecture 95kW
Hananosato Power Station Shimogo, Fukushima Prefecture 175kW
Banyagawa Power Station 150kW
Himenuma Power Station Inawashiro, Fukushima Prefecture 160kW
Minochigawa Power Station Hiroshima City, Hiroshima Prefecture 180kW
Sagotani Power Station 108kW
Toyohira Power Station Kitahiroshima, Hiroshima Prefecture 112kW
Tsukuyone Power Station Wasaku Town, Tottori Prefecture 7,890kW
Oshika Power Station No.1 Misasa Town, Tottori Prefecture 3,700kW
Oshika Power Station No.2 Misasa Town, Tottori Prefecture 4,990kW
Hinogawa Power Station No.1 Hino Town, Tottori Prefecture 4,300kW

Mibugawa Power Station has obtained Eco Action 21*2 certification, the first hydro-power facility to do so. Given that the intake of Power Station No. 2, which is located at the highest elevation, is next to a quasi-national park, and the facilities of the Mibugawa Power Station are in a region with high biodiversity value, we strive not only to avoid destruction of nature, but also to preserve it. As part of that effort, in addition to conducting river cleanup activities and facility maintenance and emergency response training to be prepared for possible oil spills, Mibugawa Power Station takes measures for protection of biodiversity by conducting water quality inspections twice a year, not only to determine whether pollutants are present, but also to check whether the water has the oxygen content required by living organisms. The facility also welcomes local elementary and middle school students and over 100 residents each year for tours of the power station, and presents exhibits of hybrid power generation systems (wind, solar and hydro-power). These and other activities help educate people about renewable energy and pass on the region’s traditional culture.

At the Hokuto City Murayamarokkamuraseki Waterfarm*3, we use existing irrigation canals to supply renewable energy while making appropriate adjustments to the volume of water used to ensure adequate supplies of irrigation water for farmland and water for household use.

At the micro-scale hydro-power station in Shiroishi City, Miyagi Prefecture, the elevation difference in water pipes of water supply facilities is used to generate electricity with minimal impact on the surrounding environment.

In addition, in selling power through Marubeni Power Retail Corporation, we are helping to improve biodiversity by allocating a portion of the electricity fees to forest maintenance and management.

The Marubeni Group aims to develop about 40 micro-scale hydro-power generation facilities in Japan by 2025. Across Japan, we are actively working on generation of renewable energy that contributes to conservation of the local environment and biodiversity.

  • A system based on guidelines for environmental management systems and environmental reporting set by the Ministry of the Environment
  • The four micro-scale hydro-power stations at Murayamarokkamuraseki in Hokuto City (Hokuto Nishizawa Power Station, Hokuto Murayamarokkamuraseki Hydro-power Station (municipally-owned), Hokuto Kagoishi Power Station and Hokuto Kurabara Power Station)

Initiatives for Solar and Wind and Biomass Power Generation

Throughout Japan, in addition to the development of micro-scale hydro-power generation projects, the Marubeni Group is actively working on generation of renewable energy that contributes to conservation of the global environment and biodiversity.


Cooperation and Collaboration with Various Organizations

Marubeni is committed to proactively and appropriately engaging in diverse climate change countermeasures through cooperation and collaboration with various stakeholders, regardless of the level of influence of the stakeholder or affiliated industry group.

Industry Groups

As a member of the Japan Foreign Trade Council (JFTC), Marubeni agrees with the Low-Carbon Society (Plan for achieving the post-Kyoto Protocol Targets) proposed by Nippon Keidanren (“Keidanren”), and takes part in the working groups and public meetings on climate change held by Keidanren and JFTC.
Marubeni takes climate change countermeasures in accordance with the policies of Keidanren’s Low-Carbon Society. We have set the goal of reducing the energy use (electricity and gas) at the Tokyo Head Office and the Osaka Branch by 10.5% in the fiscal year ended March 2021 relative to the fiscal year ended March 2010, by introducing energy-saving facilities etc. (Marubeni takes initiatives for climate change countermeasures regardless of the level of influence of the affiliated industry group.)

Marubeni also takes part in discussions related to environmental initiatives of trading companies, as a member of the Global Environment Committee of the Japan Foreign Trade Council (JFTC).
At the Committee, we make plans for the Voluntary Action on the Environment (Commitment to a Low Carbon Society) for the trading company industry, grasp energy consumption, promote the 3R (reduce, reuse, recycle) activity, and incorporate new energy through our business activities.

Government and Government Offices

Marubeni actively participates in subcommittees and workshops on climate change held by the Ministry of Economy, Trade and Industry (METI) and the Ministry of the Environment. In the year ended March 31, 2019, we became a working-group member of the METI Study Group on Implementing TCFD Recommendations for Mobilizing Green Finance through Proactive Corporate Disclosure (Study Group on Implementing TCFD Recommendations), and have discussions with other group-member companies on the best approach to disclosure of the financial impact of climate change.


Marubeni supports the activities of the international environmental protection group, World Wide Fund for Nature. Marubeni participates in certification systems in areas such as wood products, seafood, and vegetable oil. Additionally, the Marubeni subsidiary Mibugawa Power Company takes part in the Japan Climate Initiative and promotes renewable energy projects with the aim of creating a society that leaves a minimal carbon footprint.