Karasuno High Team Formation ArcEdit
Yamaguchi and Tsukishima join Karasuno Boys’ Volleyball Club a few days after it begins for the new school year. That evening, they visit Hinata and Kageyama at the field where they’re practicing. Tsukishima mocks the two while Yamaguchi stands off to the side, smirking along. When Hinata asks about Tsukishima’s height, Yamaguchi answers for him, irritating Tsukishima. On the way home after this, Yamaguchi asks Tsukishima if something's wrong and Tsukishima angrily replies that he hates hot-blooded people like the other two first years.
First Years Match
On the day of the match, Tsukishima begins by insulting Kageyama and Hinata and Yamaguchi hurriedly warns Tsukishima, only for the latter to retort that he’s using provocation on purpose. Yamaguchi doesn’t show much of his abilities during this match as Daichi covers the receives and Tsukishima covers the blocks. In the end, his team loses to Kageyama and Hinata’s.
At the end of the match, Yamaguchi calls out to Tsukishima worriedly as Hinata attacks him in an attempt for a handshake. Yamaguchi gets his team jacket and hesitantly poses with Tanaka and the other upperclassmen.
He is seen with Kageyama, Tsukishima, and Tanaka intimidating two members of Aoba Jousai. He does not play in the match. He is upset by the fact that he is the only first year not playing.
Yamaguchi did not play in this match.
Yamaguchi did not play in this match but he provided the playing members of the team with praise, cheers and encouraging words.
Aoba Jousai (Tournament Match)
During a timeout the players who were just on appear incredibly exhausted to Yamaguchi, but he claims to be jealous, and that he's sick of being the only first year who never gets to play. After being convinced by Sugawara and Ukai, Yamaguchi swaps with Hinata to attempt the jump float serve, with the intention of changing the match's momentum. However, he makes an error and the serve goes into the net. This upsets him incredibly as he leaves the court nearly in tears.
Later, he talks with Makoto Shimada, his unofficial volleyball guide, about the match, who advises him about his choices in volleyball and reveals to him about his own experiences with volleyball. This motivates and determinates Yamaguchi to try harder in volleyball next time.