Kimura trains as lieutenant under yakuza mentor Suzuki, relishing control over Treasure Town's streets through illicit acts. As Suzuki's protégé, he masters underworld operations and enforces territorial dominance with skill. His path shatters when corporate boss Snake commands him to assassinate Suzuki, forcing Kimura into lethal betrayal against his mentor. This violent act fractures his loyalty and sparks rebellion against Snake's authority. Seeking escape from the criminal life, Kimura plans to flee Treasure Town with his pregnant wife, aiming for a fresh start beyond the yakuza strife. Assassins intercept him before departure, cutting short his escape and his life. Kimura's arc embodies the struggle between corruption and redemption, his love for his wife and unborn child driving his attempted rebellion against Treasure Town's destructive forces, mirroring the central Black and White dynamic while exploring the breakdown and potential restoration of brotherhood bonds.