Mikizō Ueda (Japanese: 上田幹藏) was a Japanese supercentenarian who had been the oldest known living man in Japan since the death of Motoi Fukunishi on 22 August 2020, as well as the oldest known living veteran of World War II since the death of Mollie Walker on 22 January 2022, until his death. His age has been validated by LongeviQuest.