The film's re-release was halted indefinitely as a result of the COVID-19 pandemic, with it yet to be officially released. This version of the film is remastered in 4K, and includes a reworked soundtrack and newly recorded voice acting. In 2020, the film was planned to be re-released theatrically to coincide with the 75th anniversary of the Moomin franchise. It was the seventh most watched film in Finland during the 1992/1993 season with 166,738 viewers. The film was later released in Europe, and has been dubbed to several European languages. The international version of the film featured a new musical score composed by Pierre Kartner. In addition, he composed two new opening and ending songs for the film-'Shiawase no morugaane' and 'Kono uchuu he, tsutae tai', respectively, both sung by Emiko Shiratori.

The original Japanese release of the film was scored by Sumio Shiratori, re-using compositions that were created for the anime series. It was released in Japan first theatrically on Augas a triple-feature with two unrelated shorter films, and was later released on home video with 10 minutes of extra footage.

It was the first full-length Moomin film, and serves as a prequel to the 1990 anime series Moomin, introducing characters that would later appear in the series. The film is based on the novel of the same name by Finnish illustrator and writer Tove Jansson, originally published in Swedish. Comet in Moominland (Japanese: ムーミン谷の彗星, Hepburn: Mūmindani no Suisei) is a Dutch-Japanese anime film by Telecable Benelux B.V.ムーミン谷の彗星, Mūmindani no suisei) ist ein Animefilm von 1992, der auf dem Roman Komet im Mumintal aus der Mumin-Reihe von Tove Jansson basiert.

Moomin comet in moominland