Ōsaka Prefecture is located in the Kansai region of central Honshu. It covers about 1,905 km², making it the 46th largest prefecture in Japan by area.
Osaka is bordered by Hyogo to the northwest, Kyoto to the north, Nara to the southeast, and Wakayama to the south. Most of the population are concentrated in the southern basin.
The capital, Osaka City, is Japan’s third-largest city and the center of the Keihanshin metropolitan area, which it shares with Kyoto and Kobe. Other major cities include Sakai, Higashiōsaka and Suita.
The flag of Osaka Prefecture was adopted on March 30th 1984. It features a blue field with stylized white ‘O’ symbols branching out to represent prosperity and harmony. From 1968-1984 a green field was used.
| Capital City | Area | 2019 Population |
| Osaka city | 1,905.14 km2 (735.58 sq mi) | 8,823,358 |
Japanese prefectural flag designs are used for educational purposes under fair use. Sources include public domain and freely licensed content.