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
We own and operate 21 power plants located at former Refinery and oil terminal sites, etc. The total power generation capacity is approximately 41MW, equivalent to the annual consumption of approximately 13,000 average households *1.
-
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 | Location | Start of operation | Solar power generation capacity |
|---|---|---|---|
| Niigata Petroleum Products Import Terminal Phase I Mega Solar Power Plant | Niigata Prefecture | Septemper 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 |
| Niigata Petroleum Products Import Terminal Phase Ⅱ Mega Solar Power Plant | Niigata Prefecture | March 2014 | 6,948kW |
| Showa Yokkaichi Oil Kusunoki District Solar Power Plant | Mie Prefecture | July 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 Power Plant (No.1) | Fukuoka Prefecture | November 2013 | 2,852kW |
| Moji Power Plant (No.2) | Fukuoka Prefecture | November 2013 | 2,916kW |
| Himeji Power Station | Hyogo prefecture | March 2014 | 14,688kW |
| Onahama Power Plant | Fukushima Prefecture | November 2014 | 1,804kW |
| SF Kunitomi Solar Power Plant (Building No. 3) | Miyazaki Prefecture | February 2013 | 2,408kW |
| Miyazaki Logistics Center Solar Power Plant | Miyazaki Prefecture | July 2014 | 882kW |
| SF Ichinomiya Power Plant | Aichi prefecture | March 2016 | 858kW |
| SF Saitama Midori Ward Power Plant | Saitama Prefecture | March 2016 | 1,268kW |
| SF Taiwa Solar Power Plant | Miyagi Prefecture | July 2017 | 2,447kW |
| SF Miyagi Ohira Solar Power Plant | Miyagi Prefecture | March 2018 | 1,627kW |
| Sodegaura Hirakawa Solar Power Plant | Chiba Prefecture | October 2025 | 3,301kW |
| Idemitsu Tokushima Agrivoltaic Solar Power Plant | Tokushima Prefecture | February 2026 | 2,077kW |
Solar power plant operated jointly with other companies
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%). It operates at eight locations nationwide, including the former sites of Refinery and oil terminal depots of Cosmo Oil Co., Ltd. and our group companies.
| Official name | Location | Completion | Solar 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 Prefecture | 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
| Operating company | US Power Co., Ltd. |
|---|---|
| Investment ratio | Our company 50%, UBE Corporation 50%. |
| Location | Yamaguchi Prefecture |
| Solar power generation capacity | 21,000 kW |
| Start of operation | July 2014 |
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 |
| Solar power generation capacity | 30,000 kW |
| Start of operation | July 2016 |
About Solar Frontier K.K
Solar Frontier is a wholly owned subsidiary of our company. The company is engaged in businesses that contribute to expanding the number of installation sites for solar power generation, long-term stable use, Resources circulation of used solar cell components, and stabilization of supply and demand in grid power systems. Specifically, the company is working on proposing self-consumption solar power generation systems, EPC *2 and O&M *3 businesses, development of systems that combine storage batteries, and development of recycling technology for used solar cell panels.
-
2. Engineering Procurement Construction (design and construction of power plant equipment)
-
3. 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 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 |
| Start of commercial operation | 2020 |
Central40
| Location | Stanislaus County, California |
|---|---|
| Power generation scale | 51,000kWp |
| Start of commercial operation | 2021 |
Pioneer
| Location | Adams County, Colorado |
|---|---|
| Power generation scale | 104,000kWp |
| Start of commercial operation | 2021 |
Luciana
| Location | Tulare County, California |
|---|---|
| Power generation scale | 73,000kWp |
| Start of commercial operation | 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.
| 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
| Power generation scale | 600kWb |
|---|
University of Reading, Iskandarputeri District, Johor, Malaysia
| Power generation scale | 600kWb |
|---|
