Yasuhiko worked on the franchise since the original Mobile Suit Gundam anime as an animation director and character designer. He later designed the characters for its sequels, Mobile Suit Zeta Gundam, Mobile Suit Gundam F91, and Mobile Suit Gundam UC. He later launched the Mobile Suit Gundam: The Origin manga, which retells the original series' story with some added or changed details. This became the basis of OVA of the same name, which served as a prequel to the original anime. Yasuhiko worked on said project as the OVA's chief director.
[Source: Anime News Network]