After graduating from Meiji University, Sasaki joined NTT Kanto. He was a midfielder. He contributed to the club's promotion to Japan Soccer League Division 2 in 1987. He retired in 1991.
Sasaki served as the head coach of Japan Football League side Omiya Ardija in 1998, then took various other positions at Omiya, including the youth team head-coach and the head of development.
In 2006, Sasaki became the assistant coach of Japan women's national team, as well as the head coach of its U-20 team. In 2008, he was promoted to the head coach of the national team, succeeding Hiroshi Ohashi.
Sasaki was the manager of the Japan when they won the 2011 World Cup. FIFA[1] named Sasaki 2011 "Coach of the Year".[2] He also coached the national team to a second-place finish at the 2015 World Cup.
↑FIFA is an acronym. FIFA stands for Fédération Internationale de Football Association, which is the commonly used French name of the International Federation of Association Football.