Abstract
Interdisciplinary approaches are necessary to solve issues in hilly and mountainous area since the impact of depopulation as well as climate change is important in those areas. A research group which is composed of members from various research filed aims to study those issues with local government and communities. The group conducted three topics; 1) the investigation about long-term impact of flood; 2) the investigation of land-use change in the frequently flooded area; 3) the workshop about small ponds for agriculture. While the discussion is still on going, we found some important keywords which would be the core of our future activities.