Hidehiko Inagaki is a graduate student in biology at the Caltech. His main interest is in how the emotions are represented in the brain. As a model system, he studies the neural circuitry basis of hunger in flies. In addition, his thesis is focused on developing novel methods to visualize and control chemical circuits in the brains, which have important roles in the control of emotions. As an undergraduate researcher at the University of Tokyo, Hidehiko worked in various research areas including cancer, bioinformatics, development neuroscience, and fly behaviors. At Caltech, he works with Professor David J. Anderson. He also used to work in a scuba diving shop, where he was fascinated and interested in variety of innate behaviors animals exhibit under the sea.