- Saga City is a city located in the Saga Prefecture of Japan. It is the capital city of the prefecture and has a population of approximately 234,453 people as of 2021. Saga City is known for its historical landmarks, such as the Saga Castle Ruins and the Jofukuji Temple. The city also has a rich cultural heritage, with traditional crafts such as Saga pottery and Saga traditional textiles being popular. In addition to its historical and cultural attractions, Saga City also offers modern amenities, including shopping malls, restaurants, and entertainment venues.