Masahiro Kimura received B.S., M.S., and Ph.D. degrees in mathematics from Osaka University, Osaka, Japan, in 1987, 1989, and 2000, respectively. In April 1989, he joined Nippon Telegraph and Telephone Corporation (NTT), Tokyo, Japan. From April 1989 to August 1994, he worked at NTT Human Interface Laboratories, Kanagawa/Tokyo, Japan, where he was engaged in computer graphics research. From September 1994 to January 2000, he worked at NTT Communication Science Laboratories, Kyoto, Japan, where he was engaged in neural networks research. From February 2000 to September 2001, he worked at NTT-ME Corporation, Tokyo, Japan. From October 2001 to March 2005, he worked at NTT Communication Science Laboratories, Kyoto, Japan, where he was engaged in Web science research. In March 2005, he left NTT. In April 2005, he joined Ryukoku University, Kyoto, Japan. From April 2019 to March 2020, he was a visiting researcher at Laboratory of Artificial Intelligence and Decision Support (LIAAD), Institute for Systems and Computer Engineering, Technology and Science (INESC TEC), University of Porto, Porto, Portugal. Currently, he is a professor at the Faculty of Advanced Science and Technology, Ryukoku University, Otsu, Japan. He is a member of the Mathematical Society of Japan, the Japanese Society for Artificial Intelligence, the Japan Society for Industrial and Applied Mathematics, and the Institute of Electronics, Information and Communication Engineers.