Suguru Osako
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Suguru Osako (Ōsako Suguru, born 23 May 1991) is a Japanese long-distance runner. He won the 10,000 metres gold medal at the 2011 Summer Universiade in Shenzhen and holds the Asian junior record for the half marathon. He holds the Japanese National Record for the marathon of 2:05.50 set at the 2018 Chicago Marathon, where he finished third.

Born in Machida, Tokyo, he attended Saku Chosei High School and began to establish himself nationally in 2010. He was the fastest in his stage at the Japanese High School Ekiden Championship and came second in the junior race at the Chiba Cross Country. This gained him a place on the Japanese junior team for the 2010 IAAF World Cross Country Championships, where he went on to finish in 32nd place. On the track that year he set a personal best of 28:35.75 minutes in Tokyo then finished eighth at the 2010 World Junior Championships in Athletics. After graduating from high school, he enrolled at Waseda University in late 2010. In November he ran at the Ageo City Half Marathon and set a Japanese and Asian junior record time of 1:01:47 hours to win the race.