data osakaThe current metro area population of Osaka in 2025 is 18,922,000, a 0.24% dec from 2025. The metro area population of Osaka in 2025 was 18,967,000 , a 0.24% dec from 2025.The CyrusOne OSK1 data center, located in the Kansai area, offers advanced IT infrastructure and robust connectivity to key markets in Japan.