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Ginnosuke Tanaka (田中 銀之助, Tanaka Ginnosuke, 20 January 1873 – 27 August 1933) is credited with the introduction of rugby to Japan. He was educated at the Leys School in Cambridge and then Trinity Hall, a college of Cambridge University. He introduced rugby to students at Keio University, in 1899, with the help of Edward Bramwell Clarke. Later, he pursued a career in banking.
For the historical background see 'Britain's Contribution to the Development of Rugby Football in Japan 1874–1998' by Alison Nish, Chapter 27, Britain & Japan: Biographical Portraits , Volume III, Japan Library, 1999 ISBN1-873410-89-1