It was part of the Alliance of Free Planets until conquered by the Nagai during the Nagai–Tof War. It was later taken by the Tofs and eventually became the location of the last battle of the conflict.
By 130 ABY, the world was a colony and fortress world of the Nagai. When the galaxy was reclaimed by the Galactic Empire of Darth Krayt, Saijo was claimed as well, with the planet becoming one of the most heavily-defended worlds in the Outer Rim.
- The University of Sanbra Guide to Intelligent Life: The Marvel Series"—Star Wars Gamer 1 "
- The New Essential Guide to Characters
- The New Essential Chronology
- The Complete Star Wars Encyclopedia
- Legacy Era Campaign Guide
- The Essential Atlas
- The Unknown Regions
- The Essential Guide to Warfare
- Star Wars: Edge of the Empire Core Rulebook