Osaka is the center of Kansai, or rather western Japan. The seat of the prefectural government is Osaka City. Ginkgo is the Prefecture's tree. Seto Inland Sea style climate.
Their specialties are takoyaki, okonomiyaki, 551 Hourai's pork buns, Dojima rolls, etc. When it comes to non-food items, they have Tsutenkaku, Biriken, Osaka people, etc.
Famous sightseeing spots include Shinsekai, Dotonbori, USJ, Osaka Castle, and the world's largest aquarium (Kaiyukan).