Oyama, Tochigi
Oyama, Tochigi
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1699939

Oyama, Tochigi

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1699939

Oyama, Tochigi

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Oyama, Tochigi

Oyama (Japanese: 小山市, Hepburn: Oyama-shi) is a city located in Tochigi Prefecture, Japan. As of 1 August 2020, the city had an estimated population of 167,647 in 70,928 households, and a population density of 980 persons per km2. The total area of the city is 171.76 square kilometres (66.32 sq mi). In 2006, Oyama became the second most populous city in Tochigi Prefecture, with the capital Utsunomiya retaining the number one spot.

Oyama is located in the far southeastern corner Tochigi Prefecture, bordered by Ibaraki Prefecture to the south and east. The terrain is almost flat, and the city is in the north-central part of the Kanto plain. The Omoigawa, a branch of the Watarase River flows through the center of the city. The Ubagawa River is on the western end of the city, Tagawa is on the eastern end of the city, and Kinugawa River is on the eastern end. Oyama is approximately 60 kilometers north of the Tokyo metropolis and approximately 30 kilometers south of the prefecture capital of Utsunomiya.

Ibaraki Prefecture

Tochigi Prefecture

Oyama has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cold winters with heavy snowfall. The average annual temperature in Oyama is 14.5 °C (58.1 °F). The average annual rainfall is 1,275.7 mm (50.22 in) with September as the wettest month. The temperatures are highest on average in August, at around 26.3 °C (79.3 °F), and lowest in January, at around 2.9 °C (37.2 °F).

Per Japanese census data, the population of Oyama has grown steadily over the past 100 years.

Oyama-shuku was a post station on the Nikkō Kaidō connecting Edo with the shrines at Nikkō, and was controlled by Utsunomiya Domain during the Edo period. Oyama town was established within Shimotsuga District, Tochigi with the establishment of the modern municipalities system on April 1, 1889. Oyama merged with the neighboring village of Otani on March 31, 1954 and was elevated to city status. On April 18, 1963, Oyama annexed the town of Mamada and village of Mita, both from Shimotsuga District. This was followed by the town of Kuwakinu on September 30, 1965.

Oyama has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 40 members. Oyama, together with the town of Nogi collectively contributes five members to the Tochigi Prefectural Assembly. In terms of national politics, the town is part of Tochigi 4th district of the lower house of the Diet of Japan.

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