#Japan #Himeji #Idemitsu Kosan #Himeji Storage #Renova

Himeji Storage Facility: A New Era in Energy Management

On October 10, 2025, the Himeji storage facility will officially begin operations, marking a significant milestone in Japan's energy landscape. Developed through the collaboration of Idemitsu Kosan, Renova, Nagase & Co., and SMFL Mirai Partners, this facility aims to stabilize the power supply while facilitating the integration of renewable energy sources.

Overview of the Facility

The Himeji storage facility is located in Himeji City, Hyogo, specifically on a portion of the site previously occupied by the Idemitsu Hyogo Refinery. With a total operational capacity of 15 MW and a storage capacity of 48 MWh, this advanced lithium-ion battery system will connect directly to the power grid, allowing for efficient charging and discharging of electricity based on variable demand throughout the day.

This facility not only serves as a mere storage solution but plays a crucial role in the demand and supply adjustment market, helping to regulate the fluctuation in power supply and ensuring a stable energy infrastructure that supports the increasing penetration of renewable energy sources. Additionally, it will leverage the capacity market, securing future generation capabilities essential for maintaining a robust electricity system.

Collaborative Efforts and Company Roles

Idemitsu Kosan

Leading the project with a 51% stake, Idemitsu Kosan focuses on the operation of the storage facility, engaging in power market transactions, and maintenance. The company is committed to contributing to Japan’s long-term goal of achieving carbon neutrality by 2050 through innovative renewable energy initiatives.

Renova

As a 22% stakeholder, Renova is set to help execute comprehensive engineering solutions and oversee financing for the project. This initiative represents a critical step towards achieving Renova's goal of a 5.0 GW operational capacity by 2030, including 0.9 GW from storage projects.

Nagase & Co.

Also holding a 22% stake, Nagase & Co. will utilize its extensive experience in battery manufacturing and sales to enhance engineering support for the facility. The firm plans to expand its service offerings to include energy management solutions, covering operation, maintenance, and technology due diligence.

SMFL Mirai Partners

With a 5% interest, SMFL Mirai Partners is involved not only as an investor but also contributes as a lender in project financing. The company aims to support the growth of renewable energy projects through a range of financial services targeted at CO2-free power generation.

Looking Ahead

As the Himeji storage facility gears towards its launch, the stakeholders express optimism about its long-term impact on the energy sector. They are committed to fostering collaboration with local communities and stakeholders to ensure safe operations while amplifying the role of renewable resources in the energy mix.

The establishment of this facility underscores Japan's accelerating shift towards a sustainable energy future. By efficiently managing the balance between energy supply and demand, it encourages the adoption of renewable energy, enhancing both environmental sustainability and economic viability. Stakeholders affirm their dedication to further developments that will support Japan's energy transition and stabilize its power grid for generations to come.

For further inquiries, interested parties may contact:

• - Idemitsu Kosan Public Relations: [email protected]
• - Renova Press Office: [email protected]
• - Nagase & Co. Future Co-creation Office: [email protected]
• - SMFL Mirai Partners Environmental Energy Development Department: TEL 03-6695-8190.