We are living with "flows" of fluids, such as air and water. Flow is generally classified into two types: "laminar flow," which is a smooth and orderly state without disturbances, and "turbulent flow," which is a chaotic state with disturbances, and most of the flows we see in our daily lives are turbulent. In turbulent flow, countless "vortices" of various sizes interact each other complexly, promoting the transport of momentum, heat, and other properties. Understanding the mechanisms of such transport phenomena by turbulence is of great importance in engineering, as it can lead to the higher efficiency of vehicles such as airplanes, as well as other fluid-related machinery like heating and cooling systems. In our research laboratory, we study various types of turbulent flows with the aim of understanding their transport mechanism. We actively engage in collaborative research with external institutions.