
Quick answer — George Morikawa worked on Hajime no Ippo: The Fighting! (Original Creator), Hajime no Ippo: The Fighting! New Challenger (Original Creator), Hajime No Ippo: The Fighting! - Rising - (Original Creator) and 3 more anime.
George Morikawa worked on Hajime no Ippo: The Fighting! (Original Creator), Hajime no Ippo: The Fighting! New Challenger (Original Creator), Hajime No Ippo: The Fighting! - Rising - (Original Creator), Hajime no Ippo: The Fighting! - Mashiba vs Kimura (Original Creator), Hajime no Ippo: The Fighting! - Champion Road (Original Creator), Hajime no Ippo: The Fighting! - Boxer's Fist (Original Creator).