Kiichirō, Kiichiro or Kiichirou (written: 麒一郎, 喜一郎 or 季一郎) is a masculine Japanese given name. Notable people with the name include:
, Japanese astronomer (1888–1970), Japanese general (1867–1952), Japanese politician and Prime Minister of Japan (1894–1952), Japanese businessman and founder of Toyota Motor Corporation (1920–1998), Japanese-American sumo wrestler