Doraemon the Movie: Nobita in the Wan-Nyan Spacetime Odyssey

Nobita's day takes an unexpected turn when he rescues a stray dog struggling in a river. Naming the dog Ichi, a nod to the sound "wan," which means "one" in Japanese, he secretly cares for it, even crafting a hidden kennel to keep it safe. His compassion doesn't stop there; he also takes in a stray cat named Zubu, and soon, a whole pack of abandoned animals finds shelter with him. Faced with the challenge of their growing numbers, Nobita and his friends hatch a plan to transport the animals back to an uninhabited era, 300 million years in the past, using the Ray of Evolution to ensure their survival.

However, their journey takes an unexpected twist when a time-space anomaly lands them a millennium before their intended destination. To their astonishment, they discover that the dogs and cats have developed an advanced civilization, rivaling that of the future. With their time machine in disrepair, Nobita and his friends must navigate this new world and seek assistance to fix it. As they confront the looming threat of an asteroid collision with Earth, Nobita's resolve to reunite with Ichi grows stronger, especially when he encounters Hachi, a dog strikingly similar to his beloved companion. The adventure unfolds across time and space, filled with unexpected friendships and challenges.