What was the first anime to receive a theatrical release in the United States, helping to pave the way for future anime films?

While Akira was the first major anime to receive a widespread theatrical release in the U.S. and played a key role in popularizing anime, there were earlier anime films that had limited releases. For example, Astro Boy had some film adaptations, but it was mainly a TV series. Additionally, Hatsune Miku: The Anime saw a feature film adaptation in the early ’80s, though it didn’t gain significant recognition in the U.S. Akira remains notable for its broader impact and success in introducing anime to American audiences.