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.
Yamada Kōrin Yamada Kōrin (山田 弘倫 , March 1869 – April 6, 1955) , whose first name is also glossed as Hirotomo, was a Japanese doctor involved in the promotion of hygiene and dermatology. He co-authored a popular handbook on cutaneous disease. Written with Keizo Dohi (土肥 慶蔵）and Asahi Kenkichi (旭 憲吉), "The Diagnosis and Treatment of Skin Disease" (皮膚病診断及治療法) was first published in 1901, and its chapters are organized according to pathology.