Solar power

Initiatives in Japan

Idemitsu Kosan constructs and operates solar power plants, making use of idle land at petroleum and petrochemical manufacturing bases and storage facilities. In addition to developing power plants on our own, we also develop power plants in collaboration with other companies.

Solar power plant operated independently by the company

Solar power plant operated independently by the company

We own and operate 13 power plants located on the site of Refinery and oil terminal. The total power generation capacity is approximately 38,000 kW, equivalent to the annual consumption of approximately 12,000 ordinary households *1.

  • Ministry of Economy, Trade and Industry Agency for Natural Resources /Based on estimated monthly electricity consumption of 300kWh/month for general households

Official name (abbreviation) location Completion Power generation capacity
Niigata Snow Country Type Mega Solar (Niigata Daiichi) Niigata Prefecture August 2010 1,002kW
Gamagori Solar Power Plant Aichi prefecture November 2013 641kW
Matsuyama Solar Power Plant Ehime Prefecture November 2013 640kW
Shimonoseki Daiichi Solar Power Plant Yamaguchi Prefecture December 2013 598kW
Second phase in Niigata petroleum product import terminal (Niigata second mega solar) Niigata Prefecture February 2014 6,948kW
Showa Yokkaichi Oil Kusunoki District Solar Power Plant (Kusunoki Mega Solar) Mie Prefecture June 2014 2,304kW
Solar power plant within Hekinan LPG base Aichi prefecture August 2015 769kW
Shimonoseki Daini Solar Power Plant Yamaguchi Prefecture November 2015 996kW
Nagoya solar power plant Aichi prefecture August 2016 2,559kW
Moji Daiichi Power Plant Fukuoka Prefecture November 2013 (start of operation) 2,852kW
Moji No. 2 Power Plant Fukuoka Prefecture November 2013 (start of operation) 2,916kW
Himeji Power Station Hyogo prefecture March 2014 (start of operation) 14,688kW
Onahama Power Plant Fukushima Prefecture November 2014 (start of operation) 1,804kW

Solar power plant operated jointly with other companies

CSD Solar LLC solar power plant

CSD Solar LLC solar power plant

CSD Omishima

CSD Solar LLC is a company jointly established by our company, Cosmo Oil Co., Ltd., and Development Bank of Japan, Inc. (our investment ratio is 35%). We operate at eight locations nationwide, including Refinery and oil terminal owned by Cosmo Oil Co., Ltd. and our group.

Formal name location Completion Power generation capacity
CSD Solar Hitachi Solar Power Plant Ibaraki Prefecture April 2014 384kW
CSD Solar Oita Solar Power Plant Oita Prefecture April 2014 573kW
CSD Solar Tokushima Solar Power Plant Tokushima May 2014 1,229kW
CSD Solar Taniyama Solar Power Plant Kagoshima prefecture August 2014 1,188kW
CSD Solar Fukui Solar Power Plant Fukui prefecture September 2014 1,966kW
CSD Solar Kasumi Solar Power Plant Mie Prefecture February 2015 4,608kW
CSD Solar Ohgishima Solar Power Plant Kanagawa Prefecture May 2015 7,571kW
CSD Solar Omishima Solar Power Plant Ehime Prefecture June 2016 6,006kW

Total: Approximately 24,000 kW (equivalent to approximately 7,500 ordinary households)
Our portion is 35% of the above.

US Power Power Plant

US Power Power Plant
Operating company US Power Co., Ltd.
Investment ratio Our company 50%, Ube Industries Co., Ltd. 50%
location Yamaguchi Prefecture
Power generation capacity 21,000 kW
start operation July 2014

SOL de Omura Minoshima Solar Power Plant

SOL de Omura Minoshima Solar Power Plant
Operating company Nagasaki Solar Energy LLC
Investment ratio Our company 50%, Chopro Co., Ltd. 50%
location Nagasaki Prefecture
Power generation capacity 30,000 kW
start operation July 2016

About Solar Frontier K.K

Solar Frontier is a wholly owned subsidiary of our company. We are developing businesses that contribute to the expansion of solar power generation installation locations, long-term stable use, Resources recycling of used solar cell components, and stabilization of supply and demand in grid power systems. Specifically, we are working on proposing self-consumption solar power generation systems, EPC *2 and O&M *3 businesses, developing systems that combine storage batteries, and developing recycling technology for used solar panels.

  • Engineering Procurement Construction (design and construction of power plant equipment)

  • Operation & Mainenance

Initiatives overseas

As the demand for electricity increases worldwide, renewable energy including solar power generation is expected to play a central role in meeting power generation demand. Our company is actively participating in the solar power generation business in North America and Asia, where demand is expected to grow.

Mega solar development

North America

North America

North America is an area with good sunlight conditions and institutional support, and a mature market for solar power generation. Through our consolidated subsidiary, Idemitsu Renewables America, Inc., we are participating in solar power plant development projects, and currently four mega solar projects have been completed and are in operation.

Mustang II

location Kings County, California
Power generation scale 210,000kWp
Commercial operation begins 2020

Central40

location Stanislaus County, California
Power generation scale 51,000kWp
Commercial operation begins 2021

Pioneer

location Adams County, Colorado
Power generation scale 104,000kWp
Commercial operation begins 2021

Luciana

location Tulare County, California
Power generation scale 73,000kWp
Commercial operation begins 2022

Vietnam

Southeast Asia, including Vietnam, is expected to see steady growth in demand for renewable energy. Our company built a mega solar power plant in southern Vietnam in 2019. This is the first large-scale solar power plant development in the Southeast Asia region. The operating entity of the power plant is Song Giang Solar Power Joint Stock Company (Song Giang Solar Power JSC), in which we have invested through our group companies.

North America
location Cam Ranh City, Khanh Hoa Province
Power generation scale 495,000kWp
Completion 2019

On-site PPA (Power Purchase Agreement) initiatives

PPA is a system in which a business operator installs a solar power generation system on the premises, roof, or other space provided by the facility owner and supplies the generated electricity for a fee. We are developing rooftop solar power generation projects for industrial and commercial facilities mainly in Singapore, Malaysia, the Philippines, and Vietnam.

Example of rooftop solar power generation business

Head office of HSL Constructor Pte.Ltd, an international infrastructure general contractor in Singapore

North America
Power generation scale 600kWb

University of Reading, Iskandarputeri District, Johor, Malaysia

Power generation scale 600kWb
University of Reading, Iskandarputeri District, Johor, Malaysia
University of Reading, Iskandarputeri District, Johor, Malaysia