is a town located in Kushiro Subprefecture, Hokkaidà Â, Japan. , the town had an estimated population of 6,345 in 3692 households, and a population density of 8.2 people per km<sup>2</sup>. The total area of the town is .
Teshika is located in southeastern Hokkaido, at the foot of the Kussharo Caldera and the Mashà « Caldera to its east, and to the east is the Nemuro Plateau. To the south it borders Shibecha Town and is connected to the Kushiro Wetlands. Approximately 70% of the town is covered by mountains and forests. Mount Mokoto, at 1000 meters, is the highest elevation in the town. Much of Teshika is within the borders of the Akan Mashu National Park. Lake Mashà « (Ainu: Kamuy-to), Lake Kussharo (Ainu: Kutcar or Kutcaro), volcanic caldera lakes are located in the town.
According to the Köppen climate classification, Teshikaga has a humid continental climate. The climate of Teshikaga is cool, with an average annual temperature of 5 ðC. The first snowfall occurs in early November, with snowfall of around 50âÂÂ100 cm. However, from December to March, the average temperature drops below freezing, making it extremely cold. The Kawayu area of Teshikaga has recorded temperatures below -30 ðC.
Per Japanese census data, the population of Teshikaga has declined in recent decades.
Remains of dwellings from the JÃ Âmon period have been found within the town, including the Kussharo Kotan Ruins, indicating that people have lived there since ancient times. Records by Matsuura Takeshiro and others indicate that during the Edo period, Ainu people lived in settlements in Tesukaka (present-day Teshikaga) and Kutcharo (Kussharo). A sulfur mine was established in 1876, and was eventually transferred to the Yasuda zaibatsu. In 1888, the Kushiro Railway, Hokkaido's second railway line, was laid between Ioyama and Shibecha for transportation purposes. However, overexploitation led to resource depletion, and operations ceased nine years later in 1896. Japanese farming settlement had started from 1880 In 1890, the Teshikaga Imperial Estate was established under the jurisdiction of the Imperial Household Ministry's Imperial Estates Bureau as a forestry estate. In 1923, Teshikaga was incorporated as a second-class village. It became a first-class village in 1943 and was raised to town status in 1947.
Teshikaga has a mayor-council form of government with a directly elected mayor and a unicameral town council of 11 members. Teshikaga, as part of Kushiro Subprefecture, contributes one member to the Hokkaidà  Prefectural Assembly. In terms of national politics, the town is part of the Hokkaidà  7th district of the lower house of the Diet of Japan.
The main industries in Teshikaga are tourism and dairy farming. Lake Mashà «, Lake Kussharo, ski resorts, and hot spring resorts such as Mashà « Onsen, and Kawayu Onsen are major tourist destinations, attracting many tourists from all over the country.
Teshikaga has four public elementary schools and two public middle schools operated by the town government and one public high school operated by the Hokkaido Board of Education. The Kitami Institute of Technology Kussharo Training Center, the Teshikaga Crustal Movement Observatory of Hokkaido University and the Cold Region Biological Production Research Facility of Tamagawa University's College of Agriculture are located in the town.
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