Osaka is the second largest city in Japan, and is the biggest city in the western part of Japan with a population of 8.8 million. There are 2 major airports(Itami Airport and Kansai Airport), and you can also get on the bullet train from JR Shin Osaka station, making it easy for access.
Osaka is surrounded by some illustrious cities, and has unbeatable access to all of them, whether it be Kyoto with its traditional atmosphere, the exotic feeling of Kobe, the Historical city of Nara or the religious city of Wakayama(Koyasan).
Osaka castle and Shinsaibashi (Dotonbori) are famous and popular among foreign tourists.
Universal Studio Japan, and one of largest aquariums in the world Kaiyukan are other popular choices.
Kuidaore means to collapse from overeating, and this word is used to express Osaka's extravagant food culture. The popular phrase Kyo no Kidaore, Osaka no Kuidaore, Edo no Nomidaore (Kyoto people are extravagant in dress, Osaka people in food and Edo people in sake) express the general understanding that people in Osaka spend a lot of money on food. It is said that you can eat good food at a cheap price in Osaka.