Rick and Morty: The Great Yokai Battle of Akihabara, or simply The Great Yokai Battle of Akihabara, known in Japan as , is a Japanese CGI-anime short film based on the American television series/franchise Rick and Morty, and parodying Pacific Rim, produced by Sola Entertainment and Telecom Animation Film, released unannounced to Adult Swim's YouTube channel on October 11, 2021 as a Halloween special. Written by Naohiro Fukushima and directed by Masaru Matsumoto and Morihito Abe, the film received positive reviews from critics.
Produced by Sola Entertainment and Telecom Animation Film, and written by Naohiro Fukushima from a story by Joseph Chou, and directed by Masaru Matsumoto and Morihito Abe, in response to the critical and commercial success of the previous short films Samurai & Shogun, Rick and Morty vs. Genocider, and Summer Meets God (Rick Meets Evil), the CGI-anime short film The Great Yokai Battle of Akihabara was released unannounced to Adult Swim's YouTube channel as a Halloween special on October 11, 2021, Included on the 2025 Edition, Deluxe Edition, and Expanded Edition in the summer of 2025 before reairing during Toonami's late-night block on October 16.
The Great Yokai Battle of Akihabara received a generally positive critical reception.