Historical researcher. He has been involved in the planning and editing of numerous historical books, and has written, lectured, and appeared on TV. Under the name “Noboru Hisayama,” he is also involved in the supervision of creative historical works and historical research. He also served as historical supervisor for the movie “Moshi Moshi Tokugawa Ieyasu ga Prime Minister ni naratta” (If Tokugawa Ieyasu Became Prime Minister), which will be released this summer.