Kodai Senga was born in Gamagu014dri, a city in Japan’s Aichi Prefecture on the island of Honshu. A corner infielder until he began attending Gamagu014dri High School, his coach saw the strength and accuracy of his arm and saw Senga on the mound. The right-hander only pitched limited innings in high school during this transitionary time, but professional scouts took notice. On October 28, 2010, in the Nippon Professional Baseball Draft, the Fukuoka SoftBank Hawks selected Senga with their fourth pick in the Developmental Player Draft- a special phase of the draft in which teams select Developmental Players, players who are under contract to the organization but are not necessarily rostered on traditional minor league teams.