I see Korean script on the signs, specifically "동자 어린이공원" (Dongja Children's Park). The architecture and the dense urban environment with a mix of older low-rise buildings and modern skyscrapers are typical of Seoul. The signage style and the general atmosphere strongly point to a residential neighborhood in South Korea. I am quite confident this is in the Yongsan District of Seoul, near Seoul Station.

Country: South Korea, City: Seoul.
Confidence: High.

then: guess