Iwai Masanari was one of the Four Kings of T.F.O.A.'s 3rd generation.
While hunting for Suzuran's students he chased Yasu, who was helped by Genjirou Katsuragi to escape in his car . He chased Katsuragi's car with his motorbike and provoked an accident that got Katsuragi hospitalized .
Rindaman got enraged by his friend being injured and went after Iwai and knocked him out.
- Iwai vs. Rindaman - Lost