Yasutaro Koide (小出 保太郎, Koide Yasutaro) (March 13, 1903 – January 19, 2016) was a Japanese tailor and supercentenarian who was the oldest living man in the world at the time of his death at age 112 years, 312 days. He was the oldest living person in Aichi Prefecture from Tsuya Miura's death on March 31, 2014 until his death. He lived in Moriyama-ku, Nagoya.