Mantaro may refer to:
*
Mantarō
Mantarō, Mantaro or Mantarou (written: 萬太郎 or 万太郎) is a masculine Japanese given name. Notable people with the name include:
* (1932–1987), Japanese linguist and sinologist
* (1889–1963), Japanese writer, playwright and poet
Fict ...
, a masculine Japanese given name
*
Mantaro Valley, a valley in Peru
*
Mantaro River, a river in Peru
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