Yamada Jiro

The second son of the Yamada family, currently in high school and is an all-around athlete.
He's outgoing, has many friends, and is well liked by his peers. He is the brawn of "Odd Jobs Yamada".

He respects Ichiro and competes with Saburo for the spot as Ichiro's right-hand man.

Spoiler

His trust in Ichiro is shaken by the reappearance of his real father, Rei, but he overcomes this conflict and preforms on equal footing with his brother in the second Division Rap Battle.