Kanemaki Jisai and Sasaki Kojirō were both a what of respective fields of study?
Sasaki Kojirō Sasaki Kojirō (佐々木 小次郎 , also known as Sasaki Ganryū) (1585? – April 13, 1612), often anglicised to Kojirō Sasaki, was a prominent Japanese swordsman widely considered a master of his craft, born in Fukui Prefecture. He lived during the "Sengoku" and early "Edo" periods and is most remembered for his death while battling Miyamoto Musashi in 1612.
Kōjirō Matsumoto Kōjirō Matsumoto (松本 孝次郎 , Matsumoto Kōjirō ) is a Japanese educationist. He was a professor of Waseda University, and the provost of Tokyo Higher Normal School (today's University of Tsukuba). With educationists including Takashima (高島平三郎), he jointly founded the "Children Research" magazine in 1898, and in 1902 founded Children Research Society in Japan. In 1906 he was invited by Liangjiang Higher Normal School (today's Nanjing University) president Li Ruiqing and then came to China to be the school provost.