Yamada Yoshio (山田 孝雄; August 20, 1873 – November 20, 1958) was a Japanese linguist. He founded the influential "Yamada grammar" (Also known as "Yamada's grammar", and was the first to use the word "chinjutsu" as a linguistic term.
Source: “Yamada Yoshio”, English Wikipedia (CC BY-SA 4.0), excerpt