Height: 170 cm (5'6") Weight class: Former Featherweight, Former jr Lightweight Total fights: 14 Style: Outboxing Previous Affiliation: Karil boxing gym

Sawamura is a lonely, violent individual who had gone through a very painful childhood. As a child, his stepfather was an alcoholic who regularly physically abused Ryuuhei and his mother, and eventually the child Ryuuhei stabbed his stepfather with a knife in order to protect his mother. Soon afterwards, his mother places him in the care of the state while telling him she is looking for a job, when in reality, he is being abandoned by his mother as well (something that takes Ryuuhei 3 years to realize). His isolation and bitterness is only amplified when he is falsely condemned for killing doves that he had fed. His only friends are his old teacher from middle school and Sendou Takeshi, though he treats neither of them as such.

Sawamura is a boxer and counter-punch user who is naturally talented, but likes to cause his opponents pain in the ring, which often disqualifies him. He was the former JBC Junior Lightweight Champion and has since retired from boxing. His main fights in the series are against Makunouchi Ippo and Mashiba Ryou.