Nuclear energy is a promising option for decarbonization and has the potential to be used not only for power generation but also for a wide range of other applications, including heat utilization and hydrogen production. On the other hand, the use of nuclear energy requires an extremely high level of safety in the wake of the Fukushima Daiichi Accident. Mitsubishi Heavy Industries, Ltd. has been developing small-PWR, which are advanced and capable of meeting various needs of the future. This report presents the concept, technical characteristics, and related technologies of small-PWR for power generation with high safety features.