Nadia: The Secret of Blue Water is a Japanese anime television series created by NHK, Toho, and Korad, from a concept of Hayao Miyazaki, and directed by Hideaki Anno of Gainax. Inspired by the works of Jules Verne, particularly Twenty Thousand Leagues Under the Sea and the exploits of Captain Nemo, the series follows young inventor Jean and former circus performer Nadia, who are led off to adventure by a secret in Nadia's pendant.

Hideaki Anno is a Japanese animator, filmmaker and actor. His most celebrated creation, the Evangelion franchise, has had a significant influence on the anime television industry and Japanese popular culture. Anno's style is defined by his postmodernist approach and the extensive portrayal of characters' thoughts and emotions.