Shigechiyo Izumi

Shigechiyo Izumi (泉 重千代) was a Japanese man who was titled the oldest living person after the death of Niwa Kawamoto on 16 November 1976, also from Japan. Izumi's claimed birth date of 29 June 1865 was accepted by Guinness World Records, which recognized him as the oldest verified man ever, but this was eventually withdrawn in 2010; in the 2012 edition of the Guinness World Records book, Christian Mortensen was named the "oldest verified man ever" and Izumi was not mentioned.

Biography
Guinness World Records found a document attesting that he was 24 years old in 1889 when he was exempted from military service to deal with sugar cane fields.

Izumi drank brown sugar shōchū (a Japanese alcoholic beverage often distilled from barley or rice), and took up smoking at age 70. Izumi's personal physician strongly advised him against drinking shōchū as his kidneys were not strong enough to process shōchū in his advanced age, but Izumi went on to say: "Without shōchū there would be no pleasure in life. I would rather die than give up drinking." He retired from sugar cane farming in 1970.

Death and uncertainty over age
After a brief hospitalization, Izumi died of pneumonia at 21:15 JST on 21 February 1986. At the time, he was considered the only person ever verified to have reached the age of 120, although subsequent research has cast doubt on his actual age. In April 1987, 14 months after Izumi's death, the Department of Epidemiology at the Tokyo Metropolitan Institute of Gerontology reported that research into Izumi's family registration records indicated he might have been 105 when he died. The 2011 Guinness World Records book states that the birth certificate submitted as evidence might have actually belonged to a deceased brother, and the family may have re-used "Shigechiyo" as a necronym.

With the closing of the "Guinness World Record Museum" in Niagara Falls, Ontario, in September 2020, the display and reproduction of Izumi now resides in a private collection in Canada.

The oldest undisputed case of male longevity is Jiroemon Kimura, also from Japan, who died at age 116 years and 54 days. Jeanne Calment holds the record for verified female longevity at 122 years and 164 days.