Doraemon the Movie: Nobita and the Kingdom of Clouds

Synopsis

During a lesson about clouds, Nobita asks his teacher where heaven is located, only to be laughed at by his classmates. Determined to prove that a heavenly place exists among the clouds, he searches for evidence but is told by Doraemon that such a place cannot exist scientifically. Disappointed, Nobita eventually gets Doraemon's help to create their own kingdom in the clouds. Unbeknownst to them, there are creatures who have been living on clouds for a long time.