Doraemon: Nobita and the Birth of Japan

The opening scene follows a boy from a prehistoric village as he hunts a fish and returns home to ruins, only to be sucked into a mysterious time vortex. The sudden displacement propels him into 20th-century Japan, setting up a clash of eras that will redefine his world.

In modern Japan, Nobita longs to run away and starts by trying to set up a makeshift living space, but stubborn land ownership rules block him. Meanwhile his friends Shizuka, Gian, and Suneo also want to escape their families, and Nobita proposes a radical plan: travel back in time to a place in Japan that is free of human habitation. The group agrees and begins planning their journey.

They travel back in time to prehistoric Japan, roughly 70,000 years in the past. The new world is untamed and primal.

Doraemon assigns each member a ministry to oversee in this untamed world: Shizuka heads the Ministry of Gardening, Gian runs the Ministry of Development, Suneo leads the Ministry of Agriculture, Nobita governs the Ministry of Pets, with Doraemon supervising all. They begin organizing the camp and setting goals amid the raw landscape.

Nobita experiments with gene tinkering and creates a dragon named Draco, a griffin named Gri, and a pegasus named Pega, which he then hides from Doraemon as the others watch with awe and concern. The discovery sparks a mix of wonder and worry about the consequences of playing creator in a primitive world.

That night the group shares a meal and contemplates a return home, planning to revisit this time again later. They weigh the risks with their newly built world and the desire to return to their families.

The next day, a prehistoric boy slips into Nobita’s room and hides in the closet. When Gian and Suneo arrive, the intruder attacks Gian and fights until exhaustion. Nobita, Shizuka, and Doraemon arrive to aid, and the two groups retreat to a cave where Shizuka tends to the injured visitor.

Doraemon uses a time-signal to locate the intruder’s origin in present-day China, and a translation device helps them understand him. The visitor explains he belongs to the Light Tribe, whose people were attacked by the Dark Tribe, setting up a mission to intervene.

The friends decide to help and set off on a four-day journey to trace the Dark Tribe on their magical mounts—the Pegasus, the dragon, and the griffin. Their trek sweeps across the prehistoric landscape as they close in on the Dark Tribe.

On the fourth day they locate and clash with the Dark Tribe. A magical dogū puppet proves powerful, briefly overwhelming them despite Doraemon’s gadgets.

The team brings the Light Tribe to a peaceful spot in Japan to live, then returns home for the night. They hope to regroup and fulfill their plan to protect the Light Tribe.

The next day Doraemon reveals that the dogū’s self-restoration endangers the Light Tribe, so they travel back to the past to intervene again. They prepare to change history to save the tribe.

Arriving back, they find the Light Tribe’s village has already been destroyed by the Dark Tribe, and Nobita becomes separated from the others in a brutal snowstorm. The group pushes on to locate the Light Tribe amid the frozen chaos.

Gigazombie confronts the group and easily defeats Doraemon and the others with his advanced gadgets. Nobita then discovers a mysterious box containing a mammoth figure that urges him to press a button if he needs help. Pegasus, Draco, and Gri return to aid their friend but are trapped by Gigazombie. Nobita presses the button, and the Time Patrol arrives to arrest Gigazombie.

Gigazombie is detained, and Pegasus, Draco, and Gri are transported to the future, revealing they were never meant to exist in the present era. The friends share a sad farewell and finally return home, richer for the journey and the bonds they forged across time.