is a city located in Kōchi Prefecture, Japan. , the city had an estimated population of 26,427 in 12671 households and a population density of 290 persons per km2. The total area of the city is . The city of Tosa should not be confused with the historical Tosa Province, which covered all of modern-day Kōchi Prefecture. Geography Tosa is located in central Kōchi Prefecture on the southern coast of the island of Shikoku, and faces the Shikoku Mountains to the north and Pacific Ocean to the south. The Niyodo River flows through the Takaoka Plain in the town, where rice is grown. Surrounding municipalities Kōchi Prefecture Kōchi (city) Susaki Ino Kōchi Sakawa Hidaka Climate Tosa has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light snowfall. The average annual temperature in Tosa is 15.9 °C. The average annual rainfall is 2631 mm with September as the wettest month. The temperatures are highest on average in January, at around 25.9 °C, and lowest in January, at around 5.8 °C. Demographics Per Japanese census data, the population of Tosa has remained relatively stable for the past century. History As with all of Kōchi Prefecture, the area of Tosa was part of ancient Tosa Province. Remains from the Jōmon period dated to 4000 years ago have been found within the city limits. During the Edo period, the area was part of the holdings of Tosa Domain ruled by the Yamauchi clan from their seat at Kōchi Castle. Following the Meiji restoration, the village of Takaoka (高岡村) was established within Takaoka District, Kōchi with the creation of the modern municipalities system on October 1, 1889. Takaoka was elevated to town status on March 1, 1899. Takaoka was elevated to city status on January 1, 1959, and renamed Tosa. Government Tosa has a mayor-council form of government with a directly elected mayor and a unicameral city council of 15 members. Tosa contributes one member to the Kōchi Prefectural Assembly. In terms of national politics, the city is part of Kōchi 1st district of the lower house of the Diet of Japan. Economy Benefiting from the warm climate and abundant water, the area has long been a prosperous region for agriculture, with greenhouse horticulture in the plains and fruit tree cultivation in the surrounding mountains. In addition, the rich subsoil water of the Niyodo River has nurtured the paper