Over the last several years, the Japanese government has announced energy policies aimed to achieve carbon neutrality, or net-zero greenhouse gas (GHG) emissions, by 2050 by lowering emissions in the electric power, industrial, and transportation sectors. In the electric power sector, government policies set 2030 targets, which include accelerated investment in renewable capacity, increased use of nuclear generation, and reduced use of fossil fuels for electricity generation. Japan’s government called the package of energy policies and their targets “ambitious.” Energy security considerations may affect the progress and pace of decarbonization in the electric power sector.