Shitennoji Temple
Prince Shotoku, the father of Japan’s Buddhism, had this first Japanese Buddhism temple built in 593. In the 8th century, the respect for him has changed into a religion, which is still active to this day. Since the temple was built by Prince Shotoku, it was reestablished as Washu (Japanese religion) in 1949.
This is a famous temple in Osaka. The five-story pagoda is definitely worth paying to visit. If you have the Osaka Amazing Pass, you can enter for free. It's really worth checking out.