Yamagata (山形) was a member of Shotaro Kaneda's biker gang, The Capsules, who serves as Kaneda's right-hand-man. He appears to be the brash, brawn member of the group. (Link)
Powers and Stats
Tier: 9-C on his own, higher with weapons
Age: 17 years old
Classification: Human, bike gang member
Powers: Peak Human physical statistics, good in street combat and bike riding
Attack Potency: Street level on his own, higher with weapons
Speed: Peak Human, Subsonic on his bike
Lifting Strength: Athletic human to Peak human
Striking Strength: Street Class
Durability: Street level
Range: Melee on his own.
Standard Equipment: His bike, melee weapons.
Intelligence: Likely average or above average in terms of planning.
Weaknesses: Normal human weaknesses