A 112-year-old Japanese who has been recognized as the world's oldest living man cited "laughter" Wednesday as the secret to his longevity.Chitetsu Watanabe, who was born on March 5, 1907, pumped his fist as he was handed a certificate by a Guinness World Records official at the nursing home in Joetsu, Niigata Prefecture, where he resides. He is in good health, according to the facility."I look up to my father, no matter his age," said Watanabe's daughter Teruko Takahashi, 78.Watanabe was recognized as the oldest living man after the previous holder of the title, Masazo Nonaka from Japan's …READ FULL ARTICLE