Yo-Kai Watch: Forever Friends is a 2018 supernatural anime film produced by OLM, Inc. and distributed by Toho. It is the fifth film in the Yo-kai Watch film series, following the 2017 film Yo-kai Watch Shadowside: Oni-ō no Fukkatsu, and is the second film set in the 1960s before the series' storyline, featuring a boy named Shin who adventures into the Yo-kai World with his Yo-kai friend Nekomata. It was directed by Shigeru Takahashi, and was released on Japanese theaters on December 14, 2018 alongside the first Dragon Ball Super movie, Dragon Ball Super: Broly, and the Japanese dub of The Grinch.

Plot

"Sakura Motomachi, Tokyo in the 1960s. Shin, a boy who lived happily, despite being poor, loses his mother, his only family member, and falls into deep misfortune. Itsuki, a boy who saves Shin, also lost his older sister. Those two boys are joined by Tae, a girl who can see Yo-kai, and together with Shin's guardian spirit Sū-san, and new Yo-kai such as Nekomata, they take on a mysterious incident in order to retrieve the souls of their precious family! And what is the shocking truth that awaits them...!? This is a story about the friendship formed between three children and Yo-kai―"