Career
He is a three-time Olympian, a two-time Asian Games medalist (2002 in Busan, South of Korea and 2006 in Doha, Qatar), and a bronze medalist at the 2005 Asian Wrestling Championships in Wuhan, China. At the 2004 Summer Olympics in Athens, Sasamoto switched to a heavier class by competing in the 60 kg class. He reached the knock-out stage of the competition, by winning the preliminary pool round against Peru"s Sidney Guzman, and Serbia and Montenegro"s Davor Štefanek.
He lost a controversial ruling to Nazaryan in the quarterfinal match, with a score of 3–5, but bounced back to clinch the fifth spot in a consolation playoff against Kazakhstan"s Nurlan Koizhaiganov with a comfortable 4–0 decision.
At the 2008 Summer Olympics in Beijing, Sasamoto defeated Armenia"s Karen Mnatsakanyan in the qualifying rounds of the men"s 60 kg class, before losing out his next match for the third consecutive time to Nazaryan, with a three-set technical score (4–0, 0–2, 0–2), and a classification point score of 1–3.