Doraemon Movie 27: Nobita no Shin Makai Daibouken - 7-nin no Mahoutsukai
English title: Doraemon the Movie: Nobita's New Great Adventure into the Underworld
Japanese title: 映画 ドラえもん のび太の新魔界大冒険～7人の魔法使い～
Alternative titles: Nobita's New Adventure into the Magic Planet, Doraemon: Nobita's New Great Adventure into the Underworld - The Seven Magic Users
Type: Movie
Source: Unknown
Episodes: 1
Status: Finished Airing
Aired: Mar 10, 2007
Duration: 1 hr 52 min
Rating: PG - Children
Studios: Shin-Ei Animation
Producers: TV Asahi, Shogakukan Productions
Genres: Adventure, Comedy, Fantasy

Nobita requests of Doraemon the Moshimo-box and wishes for the world to become a place where the use of magic is possible. Witchcraft replaces science and technology and everyone makes use of it on their daily lives, except for Nobita, who, like usual, isn't very good at conjuring spells. Frustrated, he plans on returning things to their past state, but his mother threw the Moshimo-box away. 

One day, Doraemon and his friends meet Professor Mangetsu, who studies magic and magical beings such as goblins, and his daughter Miyoko, and are warned of the dangerous approximation of the "star of the Underworld" to the Earth's orbit. 

With the future of the planet at stake, the group must travel to the Underworld and pierce the heart of the Underworld King with a silver dart, as detailed in the ancient texts of "The Chronicles of the Underworld". Their attempts are, however, thwarted and Miyoko captured. 

Doraemon and his friends then decided to use the Time Machine to return to the past and, using Dorami's Moshimo-box, they manage to restore the Earth. The events on the Underworld continue, however, to take place in a Parallel Universe, where Miyoko is still captive. As a result, the group is once again forced to travel to the Underworld and defeat its tyrannical ruler once and for all. 

(Source: AniDB)