received his B.S., M.S., and Ph.D. degrees in computer science from the University of Tokyo, Japan, in 2003, 2005, and 2009, respectively. He is an associate professor in the University of Tsukuba. He was a visiting researcher in ETH Zurich from 2014 to 2016 funded by the postdoctoral fellowship for research abroad of Japan Society for the Promotion of Science (JSPS). His research interests center on computer graphics, especially rendering techniques. He studies image editing techniques for reproducing real-world phenomena as well as techniques for assisting creation of illustrations and animations.