Speaking at a regular press conference, Masui reviewed international developments in the SMR sector as part of JAIF’s annual survey, World Nuclear Power Plants 2026. He noted that while approximately 30 countries currently use nuclear power, around 20 countries are examining SMR deployment in some form, underscoring the strong global interest in the technology.
Masui cited projects involving Japanese companies, including GE Vernova Hitachi Nuclear Energy’s BWRX-300 and NuScale Power’s VOYGR SMR, which are being considered or deployed in several countries.
During the question-and-answer session, discussion focused on Japan’s involvement in the global SMR market. Masui explained the significance of overseas SMR projects from both short-term and medium- to long-term perspectives.
In the short term, he said that SMR construction abroad could create new opportunities for Japanese manufacturers to supply components and equipment, helping to maintain and strengthen the domestic nuclear supply chain. Referring to the BWRX-300 program, he noted that if the planned large-scale investments proceed as expected, the economic benefits for Japanese industry could be substantial.
From a longer-term perspective, Masui said that successful SMR deployment overseas could eventually pave the way for adoption of the technology in Japan.
He also pointed to Japanese participation in projects led by NuScale Power and Holtec International, noting that Japanese firms are already contributing through engineering services as well as the supply of equipment and materials.
At the same time, Masui cautioned that overseas projects alone would not be sufficient to sustain Japan’s nuclear technology base indefinitely. He emphasized that the continued development of the nuclear industry will require the construction of new nuclear power plants, including replacement projects, within Japan.
He further stressed the importance of the government clearly communicating its long-term vision for nuclear energy, including the scale of nuclear generation required in the future. Such clarity, he said, would demonstrate a firm national commitment to nuclear power while also providing the industry with a clearer outlook for future investment and workforce development.
