Masaichi Ueda (Japanese: 上田政一; 9 February 1909 – fl. 18 May 2019) was a Japanese supercentenarian whose age is currently unvalidated by the Gerontology Research Group (GRG).


Ueda was born in Japan on 9 February 1909. In September 2017, he was reported as the oldest living man in Osaka Prefecture. He celebrated his 110th birthday in February 2019.

Ueda was last reported alive on 18 May 2019 at the age of 110 years, 98 days. He lived in Ikuno Ward, Osaka City, Osaka Prefecture, Japan. In September 2019, he went to limbo since the oldest living man in Osaka Prefecture was reported to be Kotaro Fukumura of Osaka City, born on 7 April 1910.


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