Pokemon Gen 10 may still be a ways off with Pokemon Legends: Z-A confirmed to be the franchise's next mainline title, but such a big milestone for the beloved series has warranted a heavy amount of rumors and speculation. A big part of the discussion surrounding Pokemon Gen 10 is the game's setting, specifically what real-world country or region the game's map will be based on. While the most popular theories suggest Gen 10's region could be based on Italy or Australia, there is a solid case to be made for Pokemon to return to a region based on Japan.