Chozaburo Tanaka (?? ???, Tanaka Chozaburo) or often Romanized as Tyôzaburô Tanaka (November 3, 1885 in Osaka – June 28, 1976) was a Japanese botanist and mycologist.
He established one of the two major taxonomic classification systems for citrus and related genera currently in use, and is now considered to be a taxonomic "splitter".
He is the author of 180 botanical names in the citrus family Rutaceae, including for example Citrus × latifolia (Persian lime) and Citrus tangerina (tangerine).
Many of the species Tanaka described are still recognized, but his overall scheme is not supported by modern genetic research.