In the closed water areas including the Ariake Sea and the Yatsushiro Sea, many problems including loss of biodiversity and decline of bioresources, occur due to the deterioration of natural environment. Moreover, in the coastal areas, floods and high tides also occur frequently. Additionally, many other urgent issues have surfaced such as depopulation, a declining birth rate, and an aging population. Our laboratory promotes cutting edge and wide-ranging research and education to help solve these issues and makes efforts to create a rich natural environment. Especially, we now highlight the research and education for the restoration and creation of riverine and coastal areas, e.g. habitat utilization, life history, community structure, molecular mechanism of marine life, and interactions among different environments in the atmosphere, water and sediment. We are sure that these research and education efforts will contribute to regions in Asia and Africa which have similar issues, and which now experience rapid development of infrastructure.