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Jiroemon Kimura, the world's oldest man, lived for 104 years in the 20th century. Born in 1897, he witnessed a century of remarkable technological and social advancements. Kimura's longevity is attributed to a healthy diet, regular exercise, and a positive outlook on life. He passed away in 2013 at the age of 116, leaving behind a legacy of resilience and a testament to the human spirit's capacity for longevity.