Daichi went to Izumitate Junior High with Hayato Ikejiri and Yui Michimiya. He and Ikejiri played in the same volleyball team with Daichi as captain, even though they were weak. In their final tournament, they won the first match but were up against a powerhouse in the second. Almost everyone in the team started to lose hope, but Daichi never gave in. He was the only one to run and chase after the ball with all his might, even until the very end. However, they lost anyways. While the rest of the team all saw that coming and therefore were less upset, Daichi was the most affected one as he believed that they had at least a slight chance to actually win.
In the last year of junior high, Daichi made a promise with Ikejiri since they were going to different high schools, that they would continue playing volleyball and one day meet each other on the court again.
Daichi then enrolled in Karasuno High and joined the boys' volleyball club there. By then, Coach Ukai was already gone and the team had been left with a teacher advisor. As Daichi introduced himself, he announced his reason for joining Karasuno: he saw them play at nationals. The entire team went silent, but the captain complimented Daichi excitedly, announcing his goal to win the nationals.
As time went by, Daichi got closer to Sugawara and Asahi. One day, after practice, they were discussing their team's lack of practice matches. Hiroki Kurokawa commented that other teams didn't want to waste their valuable time on them. Daichi thinks to himself that he'd known Karasuno wasn't the same as it used to be but he thought as long as they practiced hard, there would be a day when they would rise again. However, as the days went by, it became clear that Karasuno wasn't going to change.
Refusing to give up, Daichi started staying after practice, inspiring the other first years to do the same. Along with Sugawara and Asahi, Daichi started researching volleyball tactics and improving his receive.
In the end, Karasuno lost their first match of Interhigh. Before the third years graduated, the captain announced that they had unified too late. Tearfully, he notes that Karasuno might not ever be strong again or it might be many years later but no matter what, if an opportunity comes along, the first years must grab it.