M04

Unreleased

is the fourth theatrical film in the Yo-kai Watch franchise. It is about to debut in Japan on December 16, 2017. It is the first film in the series to be a sequel to the original anime series, as well as the first crossover film with Shigeru Mizuki's GeGeGe no Kitarō Manga series.

Blurb
"There used to be a boy who could control Yo-kai with a mysterious watch. However, he became unable to see Yo-kai when he became an adult. With the boy's duties finished, the watch was buried away in space-time. Then 30 years later, quiet everyday life comes to an end as a fateful day beging with a comet drawing near. The terrible Yo-kai virus Onimaro infects people's malevolent intentions and spreads infinitely. The one chosen by the Yo-kai Watch is the one who can save humanity from its crisis. The bond between humans and Yo-kai may be recovered with the attainment of a new Yo-kai Watch."

Debuting Human Characters

 * Natsume Amano
 * Touma Tsukinami
 * Akinori Arihoshi
 * Keisuke Amano

Debuting Yo-kai

 * Onimaro
 * Kaodeka Oni
 * Jaō Kaira
 * Oni-ō Rasen
 * Fudoh Myoh-Oh
 * Kitaro
 * Medama-Oyaji
 * Neko-Musume
 * Nezumi Otoko
 * Kitaronyan

Recurring Humans

 * Nathan Adams (Mentioned)

Recurring Yo-kai

 * Whisper
 * Jibanyan
 * Komasan
 * Lord Enma
 * Nurarihyon
 * Kyubi
 * Blizzaria
 * Hungramps
 * Blazion
 * Papa Bolt
 * Slimamander
 * Azure Dragon

Pre-release information
The movie was first revealed by the staff behind Yo-kai Watch the Movie: The Great Adventure of the Flying Whale &amp; the Double World, Nyan!. They've stated that the fourth movie will be released during the winter of 2017 and that they would reveal its release date and its title on a later date.

In July, 2017, the title and its release date has been revealed in which features Lightside and Shadowside transformations. It is revealed that Yo-kai will have the ability to transform into "lightside" and "shadowside" forms. In these forms, Yo-kai show different personalities, abilities, and appearances. The magazine shows pictures of Jibanyan, Komasan, and Whisper in lightside and shadowside forms. Akihiro Hino also describes the film as a "completely new horror comedy", and will be much darker in tone than the previous films.

The key to the story will be three new human characters. The first is Natsume Amano, a 13-year-old Junior High School girl and also the daughter of Nathan Adams, who nearly drowned in a river when she was very young. She remembers "something" saving her from drowning. Second is Touma Tsukinami, a 13-year-old Junior High School boy whose parents are busy with work, so he is always alone and is mysteriously attracts Yo-kai. The last is Akinori Arihoshi, a Shaman-in-training and the oldest of the Arihoshi Siblings, whose family uses Yo-kai in fortune-telling for generations.

Later in September 13, Level-5 officially announced the film to be a crossover with Shigeru Mizuki's GeGeGe no Kitarō manga series, and with the titular characters appearing in the film. The film's second trailer is later released in October of 2017.

Casting
Most of the cast from the original anime returns to reprise their roles in the film as well as newcommers. Masako Nozawa will reprise her role again as Kitaro, 9 years after last voicing her character in the 2008 Anime Adaptation of the original Hakaba no Kitarō manga. Other cast joining the film are Yudai Chiba voicing Touma and Mone Kamishiraishi voicing Natsume while Takaya Kuroda and Daisuke Hirakawa will both voice Jibanyan and Komasan.

Video gallery
「映画 妖怪ウォッチ シャドウサイド 鬼王の復活」特報|Yo-kai Watch Shadowside: The Return of the Oni King teaser. 「映画 妖怪ウォッチ シャドウサイド 鬼王の復活」予告||Yo-kai Watch Shadowside: The Return of the Oni King trailer. 「映画 妖怪ウォッチ シャドウサイド 鬼王の復活」シャドウサイド予告|Yo-kai Watch Shadowside: The Return of the Oni King Trailer 2.

Trivia

 * This is the first Yo-Kai Watch film to be a sequel to the original anime seires.
 * It is also the first film in the series to be set 30 years after the anime's timeline.
 * The film itself marks as the only film that has no involvement of Etsuko Kozakura and Aya Endō, the original voice actors of Jibanyan and Komasan receptively. Their roles were passed down to Takaya Kuroda and Daisuke Hirakawa instead to reflect the film's darker tone.