Sasaki was born in Fukushima Prefecture in 1891. After graduating from Tokyo Higher Normal School, in May 1921, he became manager for Japan national team for Far Eastern Championship Games in Shanghai. He managed 2 matches at this competition, but Japan lost in both matches (1-3, v Philippines and 0-4, v Republic of China). These matches are not counted as "International A Match" because Japan Football Association was not founded yet.