With a population of 2.5 million, Osaka is Japan's third largest and second most important city. It has been the economic powerhouse of the Kansai region of Japan for many centuries.
Osaka was formerly known as Naniwa. Before the Nara Period, when the capital used to be moved with the reign of each new emperor, Naniwa was once Japan's capital city, the first one ever known.
Osaka Aquarium (Kaiyukan)
Osaka Castle (Osakajo)
Universal Studios Japan