TeaM Energy Foundation, Inc. (TEFI) was established to handle the CSR activities of TeaM Energy Corporation (TeaM Energy), an independent power producer in the Philippines in which Marubeni owns a 50% stake. In cooperation with the Wild Bird Club of the Philippines (WBCP) and the Department of Environment and Natural Resources, TEFI has participated in the Asian Waterbird Census, an Asian aquatic bird population survey conducted by the international NGO “Wetland International”, every year since 2010, and collects data on waterbirds within a 10-kilometer radius of the Pagbilao and Sual power plants, which are owned and operated by TeaM Energy. The survey has confirmed that the environmental impact on the neighborhoods around the power plants is low, and a healthy environment is being maintained. The areas around the Pagbilao and Sual power plants are sanctuaries of the Philippine duck (Anas luzonica), an endemic species of the Philippines that is designated as “vulnerable” in the IUCN Red List of Threatened Species 2014 issued by the International Union for Conservation of Nature. The sites of the power plants are resting spots for many other birds, including migratory birds. TEFI takes steps to safeguard the habitat of these birds through noise reduction measures, limitations on development, and habitat relocation in the event of development. In the 2020 survey, a total of 313 Philippine ducks and 10 brahminy kites were confirmed at the power plant sites and within a 10-kilometer radius.
TEFI is carrying out projects to plant acacia, eucalyptus and other tree varieties at its Pagbilao and Sual power plants in partnership with neighboring communities as well as NGOs such as Siosio East Environment. The average survival rate of the saplings planted is 95%. To date, approximately 100 hectares at Sual and 150 hectares at Pagbilao have been planted and are being maintained.
For approximately five years, until the ownership of the Pagbilao and Sual power plants are transferred to the state-run power company from 2024 through 2025, Marubeni will continue to protect and maintain a total of 144,400 ha of forests where TEFI has been carrying out conservation and afforestation, as well as at other activity areas.
Engagement to Reduce Loss of Biodiversity
Forest Conservation Activities and Providing Livelihoods to Indigenous People
Since 2010, TEFI has been implementing a Community Carbon Pools Program (C2P2) in the municipality of General Nakar in the province of Quezon, in cooperation with the Philippine Department of Environment and Natural Resources, local residents, and international and local NGOs.
TEFI conducts training and provides funding to a honey manufacturing facility powered by solar energy. In addition to honey, the communities of General Nakar produce and resin, food and other non-timber products and also engage in textile dyeing and tea harvesting. These activities provide livelihoods and improve living standards for 40 communities and over 2,000 local residents, and help to preserve the 144,000 hectares of forest and prevent deforestation. They also contribute to the reduction of GHG emissions caused by deforestation, the long-term conservation of forests, and the promotion of carbon storage with forests.
Biodiversity-friendly 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. Moreover, micro-scale hydro-power generation can help regions develop more independently as these technologies enable them to generate their own power using their own water resources.
In addition to the Mibugawa Power Station, the Marubeni Group currently operates the following micro-hydro power generation facilities.
Micro-Scale Hydro-Power Generation Facilities (as of March 2020)
Mibugawa Power Station No. 1
Ina City, Nagano Prefecture
Mibugawa Power Station No. 2
Mibugawa Power Station No. 3
Mibugawa Power Station No. 4
Tateshina Power Station
Chino City, Nagano Prefecture
Tateshina Power Station No. 2
Tateshina Power Station No. 3
Tateshina Power Station No. 4
Shinmiyagawa Power Station
Komagane City, Nagano Prefecture
Hokuto Nishizawa Power Station
Hokuto City, Yamanashi Prefecture
Hokuto City Murayamarokkamuraseki Hydropower Station
Hokuto Kagoishi Power Station
Hokuto Kurabara Power Station
Honmonji Power Station No.1
Fujinomiya City, Shizuoka Prefecture
Honmonji Power Station No.2
Shiroishi Power Station
Shiroishi City, Miyagi Prefecture
Hananosato Power Station
Shimogo, Fukushima Prefecture
Banyagawa Power Station
Himenuma Power Station
Inawashiro, Fukushima Prefecture
Minochigawa Power Station
Hiroshima City, Hiroshima Prefecture
Sagotani Power Station
Toyohira Power Station
Kitahiroshima, Hiroshima Prefecture
Mibugawa Power Station has obtained Eco Action 21*1 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*2, 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, Hokuto Kagoishi Power Station and Hokuto Kurabara Power Station)
Initiatives in Solar and Wind 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.
Main Renewable Energy Projects in Japan (as of March 2020)
Power Output (Marubeni’s share)
Type of Power Plant
Misaki Wind Power
Ikata Town, Ehime Prefecture
Onshore wind power
Tokachi-Shimizu Power Plant
Shimizu Town, Hokkaido Prefecture
Tomakomai City, Hokkaido Prefecture
Iwanuma City, Miyagi Prefecture
Sekikawa Village Mega-solar
Sekikawa Village, Niigata Prefecture
Iwaki City, Fukushima Prefecture
Ina City, Nagano Prefecture
Ina City, Nagano Prefecture
Itako Solar Power Station
Itako City, Ibaraki Prefecture
Oyama Solar Power Station
Oyama Town, Shizuoka Prefecture
Kisozaki Town, Kuwana City, Mie Prefecture, and Yatomi City, Aichi Prefecture
Cooperation with Stakeholders
Support of the Declaration of Biodiversity by Keidanren
In January of 2020, the Company announced its agreement with and support of the Revision to “Declaration of Biodiversity by Keidanren and Action Policy” of October 2018 put out by the Keidanren Committee on Nature Conservation.