As global warming progresses, disasters caused by extreme weather events such as typhoons and torrential rains are expected to become more intense and more frequent in Japan. To address this looming hazard, several research projects have been launched recently with the goal of “mitigating extreme wind and flood disasters through weather control”. However, appropriate implementation of weather control techniques into real society demands not just the development of scientific methods, and engineering applications but also the resolution of Ethical, Legal and Social Issues (ELSI) related to the introduction of these technologies. As described herein, we specifically examine legal issues associated with weather control techniques. Experts of disaster prevention, meteorology, and law employed the KJ method to identify legal issues that arise when implementing weather control. Furthermore, based on discussions using the KJ method, we extracted two important issues: 1) the implementing authority and standards, and 2) compensation. Details of these two issues were discussed further by investigating existing legal systems that might serve as bases for designing a legal system for weather control, and by examining the need for a new legal framework. This report describes an important first step in examining legal issues for developing and socially implementing weather control techniques.

　The Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) is an international project aimed at comparing impact models for climate change globally across different sectors. Through ISIMIP, multiple impact models from many fields have used the latest climate and socioeconomic scenarios in common. A large-scale multi-model ensemble climate impact projection, including its associated range of uncertainty, has been constructed for use in research and policy planning for climate change. As described in this paper, ISIMIP features and overall progress are explained in addition to the specific activities and achievements in each field. Based on the latest international trends, implications for Japanese researchers are also discussed.