HIROMASA OKU received the Dr. Eng. degrees in Mathematical Engineering and Information Physics from the University of Tokyo, Japan, in 2003. He was a Researcher in PRESTO, Japan Science and Technology Agency from 2003 to 2005. He was a Research Associate (2005-2007), Assistant Professor (2007-2011), Lecturer/Assistant Professor (2011-2014) in the University of Tokyo, and an Associate Professor in Gunma University(2014-2020). Now he is a Professor in Faculty of Informatics, Gunma University. His research interests include high-speed image processing, high-speed optical device, and dynamic image control.