A traditionally styled village, located next to Rinji's Forest, the location of the Heath Gym. The Leader here is Rinji. There is no Pokemon Center or PokeMart here, but the player can rest their pokemon and buy items at the Inn. All of the village's inhabitants belong to the same family.
Naljo is the main region in Pokemon Prism, which the player accesses after arriving from an Unidentified Region.
Naljo is mentioned various times throughout the game, and a guard blocks the Naljo exit inside the International Tunnel. It is unknown exactly where the region limits between Naljo and Rijon are within the International Tunnel, meaning that the player could technically be inside the region of Naljo in Pokémon Brown.