Yutaka Arakawa was born in 1977. He received B.E., M.E., and Ph.D., from Keio University, Japan, in 2001, 2003, and 2006, respectively. He was an assistant professor at Keio University in 2006, and became an assistant professor at Kyushu University in 2009. In 2013, he was appointed to an associate professor at Nara Institute of Science and Technology. Additionally, he worked as a visiting researcher at ENSEEIHT in 2011, at DFKI in 2012, UCLA (USA) in 2017. His current research interest is various kinds of ubiquitous computing system that combines sensors, networking, and data analysis. Particularly, he focus on activity recognition and human behavior change based on it.