Doraemon: Nobita no Uchuu Kaitakushi is an anime film that premiered in winter 1981.

About the production: the film runs about 91 minutes and its current status is "finished".

Its main genres are adventure, comedy and fantasy, with themes such as Kids and Primarily Child Cast.

On AniList, Doraemon: Nobita no Uchuu Kaitakushi has an average score of 66%, a good score, and appears on 2,116 users' lists.

Nobita has been having a weird dream about a boy named Roppel and his strange companion Chami traveling in space. By a twist of fate, he met them in person where it turns out that they are real and that they were being pursued in space, causing their space vehicle to malfunction, connecting the space vehicle itself with Nobita's room. They journeyed to Roppel's planet and amidst their enjoyment, Nobita and Doraemon pledged to help Roppel's planet free from their oppressors. (Source: Anime News Network)

Official synopsis from AniList.