His two favorite manga are Fist of the North Star and Kinnikuman, and confessed he was emotioned when reading Takehiko Inoue's Slam Dunk.
He did small job in Garou: Mark of the Wolves involving the design of Rock Howard and then moved to become the main illustrator of Fatal Fury: Wild Ambition.
Ryo Sakazaki's redesign in his older persona was created by Hiroaki as he disliked the original orange gi and wanted to mix it more with black colors.
[2] Buriki One was the only title he was involved in from the early stages of development to release while at SNK, and participated in a wide range of aspects, from design to motion capture actors.
[1] Outside SNK, Hiroaki also worked as illustrator for Capcom's beat-em up game God Hand, Advance Wars: Days of Ruin and Spikeout: Battle Street.
[4][5] Outside video games, Hiroaki provided illustrations for Akihiko Ureshino's light novel The King of Fighters 2001: The Gods Themselves.