Fusion energy does not emit CO2 and the fuel required for a fusion reaction is abundant in seawater, so fusion energy is expected to be a permanent "dream energy source." Japan is participating in the international project "ITER", which is being promoted through the international cooperation of seven ITER parties (Japan, the European Union (EU), the United States (US), Russia, China, South Korea and India) and also participating in broader approach (BA) activities aimed at the early realization of the fusion demonstration reactor (DEMO reactor), which is being promoted under cooperation of Japan and the EU in parallel with the ITER project. Mitsubishi Heavy Industries, Ltd. (MHI) has completed the world's first toroidal field (TF) coil for ITER and has just started making a prototype to prepare for the manufacture of an actual divertor. For BA activities, MHI is involved in the concept study of plasma confinement vacuum vessels for DEMO reactors, the study of maintenance concepts of equipment inside the vessel and the development of divertors for JT-60SA (SA stands for Super Advanced). This report presents the status of these activities.
