Nobita's complaint isn't philosophical, it's the complaint of a real kid who just wants somewhere that's his. The movie takes that literally, sends everyone backwards in time to find unclaimed land, and turns it into a story about why you don't actually want to be alone. By the end, a prehistoric tribe matters more than any piece of real estate ever could.

Nobita's latest escape plan hits a snag: there's nowhere left to run away to. Every piece of land on Earth belongs to someone. Soon his friends want to run away too, and even Doraemon joins in. The gang decides their only option is to travel back in time to an era before humans existed, when no one owned any land at all. In that distant past, they meet a prehistoric boy and end up helping him rescue his tribe from Gigazombie. The tenth Doraemon movie mixes comedy and fantasy into a time-traveling adventure.