Lost Universe is a series of science fiction light novels, running from 1992 to 1999, by Japanese author Hajime Kanzaka. It was later adapted into a 26-episode anime series by E&G Films that ran from April 3rd to September 25th, 1998. The series aired on TV Tokyo in the same time slot in which the anime adaptation of Kanzaka's previous work Slayers had previously been shown.

Slayers is a Japanese light novel series written by Hajime Kanzaka and illustrated by Rui Araizumi. The novels have been serialized in Dragon Magazine since 1989, before being published into individual volumes. They follow the adventures of teenage sorceress Lina Inverse and her companions as they journey through their world. Using powerful magic and swordsmanship they battle overreaching wizards, demons seeking to destroy the world, and an occasional hapless gang of bandits.