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JR Kyushu and Sumitomo Corporation have completed the 'Battery Station Tomiai' project in Kumamoto City on January 30, 2026. This grid-scale battery storage facility will participate in the Ancillary and Capacity Markets. The project aims to stabilize the power grid in the Kyushu region, addressing issues of renewable energy output curtailment, which is expected to reach approximately 1 billion kWh by fiscal 2025.