Denzo Ishizaki
After Gengan Tonaki's death on January 24, 1997, Ishizaki might have become the last living man born in 1884 and also the oldest living man in the world after 115-years-old Danish-born American man Christian Mortensen's death on April 25, 1998, although the American man Johnson Parks, who died on July 17 the same year, has been suggested to have been five days older than Ishizaki and another American man, Walter Richardson who died at age 113 later on December 25, is officially verified to have been less than a year older rather than over a year younger than Ishizaki.