Tosa is a city located in the Kōchi Prefecture of Japan. It covers a total area of 91.50 square kilometers (35.33 sq mi) and maintains a population density of approximately 290 persons per square kilometer.
As of August 1, 2022, the city had an estimated population of 26,427 residents living in 12,671 households. It is important to distinguish this specific municipality from the historical Tosa Province, which encompassed the entirety of modern-day Kōchi Prefecture.