We study the fluid mechanics of complex systems found in nature and technology. Our primary interest is to understand the form and function of living creatures in a variety of scales and their interaction with surrounding environment, which is followed by exploring nature-inspired application for novel technologies. We are also interested in flow physics and fluid-structure interaction of engineering problems such as energy conversion, environmental sustainability, and fluid machines for industry and health. In order to achieve this goal, we emphasize multi-disciplinary research and collaboration with other research groups