It is confirmed that Sae turned 18 years old during the Second Selection period. His return to Japan as a world-class midfielder sets the bar for the Blue Lock strikers.
Official character profiles reveal that Sendou, the ace of the Japan U-20 team, is also 18 years old (a 3rd-year high school student). Content Themes and Lessons BLUELOCK 18
Volume 18 of the manga is a pivotal point where the story shifts from the U-20 match to the . In this arc: It is confirmed that Sae turned 18 years