Kiyoshi Atsumi, born Yasuo Tadokoro, was a Japanese actor. He was born in Tokyo suffering from childhood malnutrition due to conditions in wartime. The resulting illnesses led him to re-take 3rd and 4th grade to recover, listening to Musei Tokugawa and rakugo on the radio. In 1942 the outbreak of war with the US forced his middle school class into a factory producing radiators for the military. He later graduated in 1945 but his family home was destroyed during the Tokyo firebombing.
After his initial ambitions of becoming a cargo sailor were opposed by his mother, Atsumi looked to acting after joining a traveling troop of actors with a friend. He started his career in 1951 as a comedian at a strip-show theater in Asakusa. A bout of tuberculosis resulted in a lobectomy, spending 2 years at a Saitama sanitorium to recover. He made his debut on TV in 1956 and on film in 1957. His vivid performance of a lovable, innocent man in the film "Dear Mr. Emperor" in 1963 established his reputation as an actor. He developed a liking to Africa after spending 4 months there to film The Song of Bwana Toshi in 1965, vacationing to Tanzania multiple times afterwards.