File:Predicted installed capacities in Japan by power source from 2022 to 2032.png

The data analysis in this chart covers the period from 2023 to 2032 and is based on electric supply plans published by the Cross-regional Coordination of Transmission Operators (OCCTO) in 2023. The total installed capacity is projected to increase from 318GW in 2022 to 358GW in 2032. During this timeframe, solar and wind energy are expected to see significant growth. Solar capacity is forecasted to rise from 70GW to 97GW, while wind capacity will more than triple from 5.3GW to 17.8GW. Fossil fuel sources, such as coal and LNG, are anticipated to experience slight increases. Oil and other sources are expected to decrease from 21.6GW to 17.67GW. Nuclear capacity will remain unchanged throughout the decade. There are no significant changes expected in conventional hydropower, pumped storage hydropower, or geothermal energy. These projections are based on data aggregated from submissions by Electric Power Companies (EPCOs), but actual outcomes may vary due to operational factors or changes in political policies.