#Japan #Renewable Energy #Battery Storage #JA Mitsui Lease #Ibaraki, Shizuoka

JA Mitsui Lease Collaborates on Battery Storage Initiatives in Japan

On September 25, 2025, JA Mitsui Lease Corporation, headquartered in Chuo-ku, Tokyo, announced its involvement in battery storage projects in Mito, Ibaraki Prefecture and Hamamatsu, Shizuoka Prefecture in partnership with Kansai Electric Power Co., Inc. and Sparks Group Inc.

Overview of the Projects

The Mito Battery Storage Facility aims for a total capacity of 50MW and 175.5MWh, with commercial operations expected to commence in June 2029. Meanwhile, the Hamamatsu Battery Storage Facility is slated to provide 30MW and 110.3MWh, targeting to start operations by June 2028. Both projects are designed to support the growing demand for renewable energy solutions in Japan.

As the reliance on renewable energy sources like solar and wind increases, their power generation can vary significantly due to weather conditions. This mismatch often leads to excess energy during certain periods, necessitating mechanisms for output curtailment to maintain stability in the energy grid. Battery storage systems play a crucial role by charging during surplus conditions and discharging during shortages, thereby enhancing the balance between supply and demand in the electrical grid.

JA Mitsui Lease Group has made it a strategic priority to evolve its business model under the mid-term management plan named ‘Sustainable Evolution 2028’. This plan positions energy transition as a growth area. With previous initiatives in renewable energy and battery storage projects, such as the one launched in Sapporo, Hokkaido in March 2025, the group is committed to fostering sustainable energy practices.

Mito and Hamamatsu Battery Storage Facilities

Both the Mito and Hamamatsu projects underline JA Mitsui Lease's commitment to contributing towards a sustainable society, facilitating the realization of a decarbonized society that benefits local communities.

Commitment to Sustainability

As Japan aims to increase its renewable energy participation, projects like those spearheaded by JA Mitsui Lease serve as a model for energy management through innovations in battery storage. These initiatives not only exhibit a commitment to environmental sustainability but also highlight the industry’s adaptability in ensuring a stable energy supply.

JA Mitsui Lease’s approach symbolizes a broader trend within the energy sector: the transition towards sustainable practices and technologies that would lay the groundwork for a greener future. The company invites stakeholders and the public to join this journey towards a sustainable energy landscape that prioritizes environmental stewardship, economic viability, and community welfare.

For further details, inquiries can be directed to the Corporate Communications Office of JA Mitsui Lease Corporation at 03-6775-3002 or via email at [email protected].