Asahi is known as Karasuno's ace, but there was a time when he pushed away his title. During the Karasuno vs Date Tech match back during his second year, all of his spikes were blocked, causing Asahi to feel disappointed in himself and blame himself for his team's loss. One night, as the team was closing up the gym, Asahi asked his teammates why they weren't blaming him, angering Nishinoya.The libero said that he wouldn't blame Asahi if he couldn't score, but he would not forgive him if he would give up so easily. As they were arguing, Nishinoya pushed Asahi backwards and Asahi broke a broom by stepping on it; even now, the broom is still in the storage room.
The next day Asahi didn't come to practice and Nishinoya approached him by Asahi's classroom. They started arguing again and this time, Nishinoya broke a vase in front of the vice principal's office, causing him to get a 1-week suspension from school and 1-month break from club activities. Asahi decided to leave the team.
A month later, Kageyama and Hinata convinced him to rejoin the team after much persistence, mostly from Hinata. Since then, Asahi has accepted his position as the Karasuno Volleyball Team's Ace.
Asahi used to be in Sekodai Junior High