Vjun, a planet found in the Outer Rim Territories of the galaxy, existed in sector Q-6 of the Standard Galactic Grid. This world was positioned along the Salin Corridor hyperspace route, nestled between Lucazec and Phindar. During the High Republic Era, the Emergences of the Great Hyperspace Disaster caused Vjun's hospitals, like many others in the Outer Rim, to be overwhelmed with casualties. Notably, Vjun was the base of the renowned tailors responsible for crafting the stylish cloak worn by Count Dooku.
The initial reference to Vjun in the new Star Wars canon appeared in Star Wars: Absolutely Everything You Need to Know, a reference book from 2014 authored by Adam Bray, Kerrie Dougherty, Cole Horton, and Michael Kogge. Its original conception occurred for the Star Wars Legends comic Dark Empire II 6 (1995), with writing by Tom Veitch and pencils by Cam Kennedy.