Kanemaki Jisai and Sasaki Kojirō were both a what of respective fields of study?
Kanemaki Jisai Kanemaki Jisai (鐘巻 自斎 , c.1536 – 1615) was a master of the Chujō-ryū fighting style. He was a student of Toda Seigen and teacher to Itō Ittōsai (possibly also Sasaki Kojirō).
Shin'ichi Ishiwata Shin'ichi Ishiwata (石渡 信一 , Ishiwata Shin'ichi ) is a Japanese scientist, a professor at Waseda University department of science and engineering physics course. His specialty is biophysics, particularly the mechanism of muscles and motor proteins.