Tsunetane Oda (小田常胤, Oda Tsunetane; March 10, 1892 – February 11, 1955) was a judoka who was influential in the development of Kosen judo. His correct name was Tsunetane Oda, but through a misinterpretation of the kanji 常胤 he is more commonly known as Join.
Source: “Tsunetane Oda”, English Wikipedia (CC BY-SA 4.0), excerpt