Japan, March 5 -- Mitsui & Co., Ltd. ("Mitsui") has subscribed to a third-party allotment of new shares by MiRESSO Co., Ltd. ("MiRESSO"), a Japan-based company engaged in fusion energy-related technologies. This marks Mitsui's third investment in the fusion energy field, following its investment in Kyoto Fusioneering Ltd. in May 2023 and Commonwealth Fusion Systems LLC in September 2025.Fusion energy is a power generation technology that produces large amounts of energy by fusing two light atomic nuclei, mimicking the same principle that powers the sun. As a sustainable energy source that emits no CO2 during power generation, fusion energy is expected to be commercially deployed starting from the 2030s.Countries around the world, including ...