Sanjin, a world possessing multiple moons, was classified as a planet. Prior to the mission targeting Vassek's third moon, Jedi Master Neebo undertook a journey to one of Sanjin's moons, intending to assist refugees there.
The initial reference to Sanjin appeared within the episode guide associated with "Lair of Grievous," an installment from the first season of the Star Wars: The Clone Wars animated show, which debuted on December 12, 2008.