— Self-funded “Full Merchant” Project Marks Entry into the Tokyo Power Market —
Tokyo, December 9, 2025 — Pacifico Energy K.K. (Head Office: Minato-ku, Tokyo; President & CEO: Hiroki Matsuo; hereinafter “Pacifico Energy”) today announced that it has commenced commercial operation of a grid-scale battery storage facility developed by the company in Tokyo Area.
This project represents a fully self-funded “full merchant” model*1, developed entirely without reliance on government subsidies, and builds on Pacifico Energy’s extensive experience and proven track record in grid-scale battery energy storage systems (BESS) *2. The company has established a vertically integrated framework encompassing development, design, procurement, construction management, market trading strategy, and asset management, enabling seamless execution from project planning to operation.
Comment from the President & CEO
“We take great pride and find deep meaning in boldly taking on the challenge of operating as a full-merchant player, independent of subsidies, in the complex and unpredictable wholesale power market.
This approach is grounded in our proprietary market analysis and trading methodologies, as well as the strong track record we have built since entering the market in 2022.
Looking ahead, we plan to further scale up our operations and achieve 660MW/2.9GWh of installations by 2030.”
— Hiroki Matsuo, President & CEO, Pacifico Energy K.K.
Through participation in Japan’s wholesale electricity market and balancing market, the facility will contribute to grid stability and the mitigation of power price volatility. Participation in the capacity market will further enhance supply reliability and system resilience.
With this operation, Pacifico Energy has entered the Tokyo power market—its third regional market following Hokkaido and Kyushu. By operating across multiple regions, the company has accumulated expertise in responding to diverse grid characteristics and market structures. Pacifico Energy will continue to expand the development of both standalone and co-located BESS projects integrated with solar power plants nationwide.
To date, Pacifico Energy has developed and commissioned a cumulative total of 1,293 MW (DC basis) of solar power plants—one of the largest portfolios in Japan. Leveraging its domestic experience in renewable generation and storage, as well as insights from advanced overseas markets, the company remains committed to achieving grid parity for renewable energy and establishing it as a core and stable power source for Japan’s energy future.
Pacifico Energy will continue its efforts to develop and operate power assets that coexist with local communities, while promoting the wider adoption of safe, clean, and affordable renewable energy throughout Japan.
Notes
*1: A business model in which project revenues are derived from participation in daily electricity markets (capacity, balancing, and wholesale) rather than through long-term bilateral contracts.
*2: Refers to standalone battery storage projects that operate solely through market-based trading without co-location with other generation assets. Pacifico Energy began full-scale development of such projects in 2021 and commenced commercial operations in Hokkaido and Kyushu in 2023.
Project Overview
Contact Information
Public Relations Department
Phone: 03-4540-7830
Email: info@pacificoenergy.jp
