is a city located in Tokushima Prefecture, Japan. , the city had an estimated population of 36,128 in 17181 households and a population density of 800 persons per km². The total area of the city is . Geography Komatsushima is located in eastern Tokushima Prefecture, south of Tokushima city, facing the Kii Channel. The city is built on the delta of the Katsuura River and is surrounded by mountains on its landward sides. Neighbouring municipalities Tokushima Prefecture Tokushima Awa Katsuura Climate Komatsushima has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light snowfall. The average annual temperature in Komatsushima is 16.6 °C. The average annual rainfall is 2128 mm with September as the wettest month. The temperatures are highest on average in August, at around 26.8 °C, and lowest in January, at around 7.0 °C. Demographics Per Japanese census data, the population of Komatsushima has slowly declined over the past 60 years. History As with all of Tokushima Prefecture, the area of Komatsushima was part of ancient Awa Province. During the Genpei War, it was the location where Minamoto no Yoshiatsu landed in Shikoku in his campaign against the Heike clan at the Battle of Yashima. During the Edo period, the area was part of the holdings of Tokushima Domain ruled by the Hachisuka clan from their seat at Tokushima Castle. Following the Meiji restoration, the village of Komatsushima was established within Katsuura District, Tokushima with the creation of the modern municipalities system on October 1, 1889. It was raised to town status on November 1, 1908. In April 1951, Komatsushima annexed the neighboring town of Tatsue. Komatsushima was raised to city status on June 1, 1951. The neighboring town of Sakano was annexed on September 30, 1956. Government Komatsushima has a mayor-council form of government with a directly elected mayor and a unicameral city council of 17 members. Komatsushima, together with the other municipalities of Katsuura District, contributes three members to the Tokushima Prefectural Assembly. In terms of national politics, the town is part of Tokushima 1st district of the lower house of the Diet of Japan. Economy Komatsushima prospered in the Edo Period as one of the main ports of Shikoku, especially for the export of indigo, which was a major local product. In the modern period, Komatsushima has developed into an industrial and regional commercial center. Agriculture (notably the production of