- Okao City is a fictional city in Japan that was created by Nintendo for the video game "Tomodachi Life." It is a virtual world where players can create and customize their own Mii characters and interact with other Mii characters in various activities and events. Okao City features different locations such as apartments, shops, parks, and amusement facilities for players to explore and enjoy. The game allows players to experience a virtual community and develop relationships between the Mii characters.