[en] Based on the report titled Activities of Fugen NPS after permanent shutdown, Fugen has been preparing for the project, including necessary development of technologies. The development of decommissioning for Fugen is divided into two areas. One area is development of unique technology for dismantling special components such as the reactor core and the heavy water system. Another area is improvement and enhancement of existing technologies. Especially, the former area requires effort and comprises development of the reactor dismantlement, tritium decontamination of heavy water system and engineering support systems. Moreover, the technical results of technology development and decommissioning activity should be organized and opened to the public so that they can contribute to other decommissioning projects. For this purpose, information exchange and co-operation with domestic and international organizations are underway. (author)