Hunter × Hunter
Before the first anime television series was created, a short film adaptation of "Hunter × Hunter" was shown as part of the 1998 "Jump Super Anime Tour" alongside similar adaptations of "Seikimatsu Leader den Takeshi!" and "One Piece". Produced by Studio Pierrot and directed by Noriyuki Abe, it depicts the early events of the manga up to Gon's ocean voyage from Whale Island.
Dia Horizon
"Dia Horizon" was announced by Square Enix as a "mixed media project" in July 2017. The smartphone game was released on Android and iOS devices in Japan on August 24, 2017, and an anime television series aired in Japan from October to December 2017. A 4-panel manga adaptation is serialized online via the official Dia Horizon website. Another manga series is serialized online via Square Enix's digital publication "Manga UP!" beginning from August 7, 2017. A novel written by Ghost Mikawa, titled "Dia Horizon: Akatsuki no Keiyakusha", was serialized online via Kadokawa's Kakuyomu website. The game was discontinued on May 31, 2018, along with "King's Knight", another Square Enix fantasy mobile game.