Doraemon: Nobita's Great Adventure in the Space Frontier

When Lulu has an accident while traveling through time and space, his spaceship door connects to the tatami floor in Nobita's room. From then on, Planet Kono becomes Nobita's second playground, where he and the Lulus enjoy a wonderful time together. However, the Calte Mining Company constantly threatens the safety of the planet's inhabitants in order to obtain mineral resources. Finally, with the help of Nobita and his friends, the conspiracy of the Calte Mining Company is thwarted, the super-time exit returns to normal, and Nobita goes back to Earth.