Chitetsu Watanabe (渡邉智哲; "Watanabe Chitetsu", 5 March 1907 – 23 February 2020) was a Japanese farmer and supercentenarian and at the time of his death aged 112 years, 355 days the world's oldest living man as well as the oldest man ever from Niigata Prefecture (since 31 August 2018 when he surpassed the age of Jokichi Ikarashi).