Osaka Castle, a staple tourist attraction in the Japanese city, attracts more than 2.5 million visitors every year. Osaka Castle Park is also home to a number of important cultural properties and ...

Osaka Castle was once the center of Japan. 03:07. I didn't know that. Who built it? 03:09. This castle was founded by the warlord. 03:12. Toyotomi Hideyoshi who unified Japan in 1590. 03:17.