Welcome to the Space Show

Welcome to the Space Show is a 2010 Japanese animated science fiction film produced by A-1 Pictures and distributed by Aniplex. It was directed by Koji Masunari from a script by Hideyuki Kurata, and stars the voices of Tomoyo Kurosawa, Honoka Ikezuki, Shotaro Uzawa, Tamaki Matsumoto, Takuto Yoshinaga, and Keiji Fujiwara. In the film, five children rescue an alien dog, and are rewarded a trip to the Moon in response. After events cause the group to become stranded in space, they must find a way to return to Earth before the kids' parents arrive.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.