Mansaku is a tall, muscular boy with neck-length brown hair and blue eyes, with one of his hair locks falling just besides his left eye. He is seen wearing a white cap with blue flap both during and outside matches.
His casual wear consists of a white shirt, a bright yellow jacket with two white stripes around its left arm, navy blue pants and blue shoes.
Mansaku was a part of Inakuni Soccer Club before it got disbanded by their coach, Fuyukai Suguru. When Inamori Asuto tried to stop the workers from demolishing their soccer field, Mansaky tried to Asuto from assaulting the workers. The next day, the team and Kozoumaru Sasuke decided to go to Inazuma Town to play soccer there and Mansaku talked to his father about his decision. Leaving Inakunijima, they arrived at Inazuma Town while staying at the Kogarashi Manor and the players became members of Inakuni Raimon. Their first match was against Seishou Gakuen but Mansaku and his teammates were easily overwhelmed by the players of Seishou Gakuen, losing 1-10.
During the match between Inakuni Raimon and Teikoku Gakuen, he was one of the players who decided to move up after seeing Teikoku's plays. He also attempted to score a goal but his shoot was blocked by one of Teikoku's defenders. When Umihara Norika's Uzumaki The Hand was broken through by Twin Boost, Mansaku was able to prevent the goal by stopping the weakened shoot with his knee. In the end, Inakuni Raimon was able to win from Teikoku with 4-3.
In preparation for the rematch against Seishou Gakuen, his coach, Zhao Jin Yun, sent him to the training session for his own private lesson. During the match, it was revealed he learnt Spark Wind during his training in the Inabikari Training Center, passing Yagihara Katsumi, and scored the second goal for Inakuni RRaimon with a loop shoot. In the end, the team won with a score of 5-4 from Seishou Gakuen and were able to advance as one of the two winners from their block.
- [OF] Spark Wind
- Mansaku's birthday is on November 1.