Western animation/J

Ja

 * Jackie Chan Adventures: Based on Jackie Chan (real life actor), where he have fantastic and magical adventures based on chinese mythology.

Je

 * Jelly Jamm - SE2-EP06: Rita tries to do her own experiments in Mina's laboratory. She will soon find that handling these products without enough knowledge can have... gigantic consequences.
 * Jem and the Holograms: This is about music company owner Jerrica Benton, her singer alter-ego Jem, her band the Holograms, and their adventures.

Jo

 * Johnny Bravo: An incel manchild has adventures everytime that he tries to get a girlfiend.
 * Johnny Test: A boy is used as a guinea pig for bizarre scientific experiments by his twin sisters.

Ju

 * Justice League Unlimited: Giganta is a prominent villian in the series.