Tetsuji has close-cropped, shaggy black hair, dark-colored eyes and an angular face.
When Tetsuji was the captain of his middle school soccer team, he took his role as a captain seriously. He has a soft side for Nozomi Onda that he doesn't show often.
Tetsuji and Kaoru Takei are childhood friends who play football together. They met Nozomi Onda in elementary and asked her to join them in a junior football league. The three friends went on to attend Fuji Daiichi Middle School together. Tetsuji became the captain of the boys' soccer team.
Tetsuji is the captain of the Fuji Daiichi Boys' Soccer team. He refuses Nozomi Onda's request to put her in the newcomers' tourney. When he realizes that Nozomi took Junpei Onda's place in the newcomers' tourney, he becomes worried for her because she can get hurt.
In the anime, he watched the Warabi vs. Kunogi practice match. After the Warabis faced Kunogi, he makes a comment on how the girls did, unaware of how they really feel. At the stadium that held the Saitama Preliminaries, he was in the audience along with Yasuaki Tani, Kaoru Takei and Junpei Onda.
They were teammates in Fuji Boys Soccer Team. They also played soccer when they were kids. He has an unrequited crush on her. He eventually accepts that Onda should play against Yasuaki Tani because he doesn't want her to think of him anymore.
Kouzou was Tetsuji's coach in the Fuji Boys Soccer Team.
- The name Tetsuji means "iron" (鉄) (tetsu) and "two" (二) (ji).
- Tetsuji's surname Yamada means "mountain, hill" (山) (yama) and "field, rice paddy" (田) (ta/da).
- Tetsuji shares the same voice actor with Tomura Shigaraki from My Hero Academia and Kei Tsukishima from Haikyuu!!