Sustainability Initiatives through our BusinessConservation of Biodiversity and Habitats

Conservation of Biodiversity and Habitats

Asian Waterbird Census

Habitat survey
Habitat survey

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 2017 survey, a total of 460 Philippine ducks and five brahminy kites were confirmed at the power plant sites and within a 10-kilometer radius.

Afforestation Program

Afforested area
Afforested area

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

  • Forest conservation activities
    Forest conservation activities
  • Interaction with local residents
    Interaction with local residents
  • Products and honey produced
    Products and honey produced

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.

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

Micro-Scale Hydro-Power Generation Facilities (as of October 2018)

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
Hokuto Nishizawa Power Station Hokuto City, Yamanashi Prefecture 220kW
Hokuto City Murayamarokkamuraseki Hydropower Station 320KW
Hokuto Kagoishi Power Station 230kW
Hokuto Kurabara Power Station 200kW
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

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 30 micro-scale hydro-power generation facilities in Japan by 2020. 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 October 2018)

Facility Location Power Output (Marubeni’s share) Type of Power Plant
Misaki Wind Power Ikata Town, Ehime Prefecture 20MW (49%) Onshore wind power
Tokachi-Shimizu Power Plant Shimizu Town, Hokkaido Prefecture 4MW Solar power
Tomakomai Mega-solar Tomakomai City, Hokkaido Prefecture 7MW
Iwanuma-Rinku Mega-solar Iwanuma City, Miyagi Prefecture 28MW
Sekikawa Village Mega-solar Sekikawa Village, Niigata Prefecture 2MW (50%)
Iwaki Mega-solar Iwaki City, Fukushima Prefecture 2MW (50%)
Tsuetsukitoge Mega-solar Ina City, Nagano Prefecture 10MW
Inahiji Mega-solar Ina City, Nagano Prefecture 1MW
Itako Solar Power Station Itako City, Ibaraki Prefecture 2MW (50%)
Oyama Solar Power Station Oyama Town, Shizuoka Prefecture 2MW (50%)
Kisosaki Mega-solar Kisozaki Town, Kuwana City, Mie Prefecture, and Yatomi City, Aichi Prefecture 49MW