Unova was the first main-series Pokémon region inspired by a place outside Japan.
Unova is the setting of Pokémon Black and White and their sequels, Pokémon Black 2 and White 2. Its design draws heavily from the New York metropolitan area rather than a Japanese prefecture or island.
The change broadened the visual and cultural scope of the franchise. Unova includes urban skylines, bridges, and landmarks that evoke New York, while its story introduces a new regional Pokédex containing Pokémon not previously seen in the main series.
Earlier regions had been inspired by areas of Japan: Kanto, Johto, Hoenn, and Sinnoh. Later regions also drew from outside Japan, including Kalos from France, Alola from Hawaii, and Galar from Great Britain.