Here's a breakdown of his contributions:
* Original story and series concept for "Mobile Suit Gundam". He worked alongside Yoshikazu Yasuhiko, the series' original character designer and director, to create the iconic mecha series that would become a worldwide phenomenon.
* He wrote the original screenplay for the "Mobile Suit Gundam" anime series.
* He also wrote and illustrated several spin-off manga series set in the "Gundam" universe. These include:
* "Mobile Suit Gundam: The Origin". This manga series explores the backstory of the "Gundam" universe and the origins of its key characters.
* "Mobile Suit Gundam 0080: War in the Pocket". This manga series tells a side story from the original "Gundam" series.
* "Mobile Suit Gundam: Side Story 0079". Another spin-off series that expands on the "Gundam" universe.
While "Mobile Suit Gundam" is his most well-known work, Eiji Orii also worked on other projects, including:
* "Genesis Climber MOSPEADA". He wrote the story and the screenplay for this mecha anime series.
* "Mobile Suit Zeta Gundam". He contributed to the story development for this sequel series to "Mobile Suit Gundam".
Eiji Orii's contributions to the "Gundam" universe and his other works have left a significant mark on the world of anime and manga.