Nobita's Dinosaur is the 1st installment of the Doraemon featured films based on the popular manga and anime series, Doraemon. It was released in 1980, one year after the premiere of the TV series (making it the first feature-length Doraemon movie. The movie was released in Japan 1 March 1980. In 2006 the movie was remade.
Nobita protected a dinosaur from hunters from the future who wanted to kill it and sent it to the past. Because of an error, Nobita and his friends came back to the past by the time machine and moved the dinosaur from North America to Japan. They the met the hunters and ran away. However, the dinosaur with Nobita and his friends was caught. The Tyrannosaurus and universe-police helped them and gave the dinosaur freedom and let it roam in nature. Nobita and his friends come back to the 20th century.