Tokyo's new large-scale energy storage project is set to begin construction in Q1 2025, marking Japan's most ambitious battery storage initiative to date. Key Timeline. Tokyo, Japan – February 25, 2025-- During Smart Energy Week 2025, Sungrow Japan signed an agreement with Sun Village Co., a pioneer in developing non-FIT solar power plants, for the procurement and sales of grid-scale energy storage systems in Tokyo. Several megawatt-hours of residential battery storage systems, typically paired with solar PV, are being. There has been a great response to the Tokyo Metropolitan Government's announcement in 2022 of “ the mandatory installation of photovoltaic power generation for new buildings ” and the term “the mandatory installation” seems to have made a particularly strong impression.