AlQa'dah 6, 1436, Aug 21, 2015, SPA -- The secret to a long, happy life that Yasutaro Koide, a 112-year-old living in the central Japanese city of Nagoya who was officially recognized by Guinness World Records on Friday as the world's oldest man, says to "not overdo.", AP reported. Koide was born on March 13, 1903, and worked as a tailor. He became the oldest man with the death of Sakari Momoi of Tokyo in July at age 112. Three of his seven children, two of his nine grandchildren and one great grandchild attended a ceremony at a nursing home where he was given a plaque and a green vase. "The best thing is to not overdo," Koide said. He also recommended not smoking or drinking and said his favorite food is bread. Koike also recommends "enjoying everything," according to local reports that say he can read the newspaper without glasses.