Hiroki Okamoto received B.E. degree and master’s degree in information science and technology from University of Tokyo, Tokyo, Japan, in 2012 and 2014, respectively. In 2014, he joined NHK. Since 2017, he had been with NHK Science & Technology Research Laboratories. He had been engaged in research and development of image sensors and cameras for the 8K Super Hi-vision. Since 2018, he has been engaged in research of information extraction on Web.