Osaka is an extremely exciting and big city to experience. It is at the heart of the country’s largest metropolitan region that consists of itself, Kobe and Kyoto. It was twice the imperial capital of Japan over a thousand years ago, but the city of Osaka, then known as Naniwa, has throughout the history been more famous for its economic power. A number of must-sees including Osaka Castle and the Kaiyukan Aquarium. Don’t miss out on the tastes of Osaka, since it is regarded as the food capital of Japan.