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Ōtoyo 大豊町 | |
|---|---|
Otoyo town hall | |
![]() Location of Ōtoyo in Kōchi Prefecture | |
| Coordinates:33°46′N133°40′E / 33.767°N 133.667°E /33.767; 133.667 | |
| Country | Japan |
| Region | Shikoku |
| Prefecture | Kōchi |
| District | Nagaoka |
| Area | |
• Total | 315.06 km2 (121.65 sq mi) |
| Population (August 1, 2022) | |
• Total | 3,277 |
| • Density | 10.40/km2 (26.94/sq mi) |
| Time zone | UTC+09:00 (JST) |
| City hall address | 231 Takasu, Ōtoyo-chō, Nagaoka-gun, Kōchi-ken 789-0392 |
| Website | Official website |
| Symbols | |
| Bird | Varied tit |
| Flower | Adonis |
| Tree | Japanese cedar |


Ōtoyo (大豊町,Ōtoyo-chō) is atown located inNagaoka District,Kōchi Prefecture,Japan. As of 1 August 2022[update], the town had an estimatedpopulation of 3277 in 1968 households and apopulation density of 10 persons per km2.[1] The total area of the town is 315.06 square kilometres (121.65 sq mi).
Ōtoyo is located in northeastern Kōchi Prefecture on the island ofShikoku. TheYoshino River and the Ananai River flow through the town, which extends 32 kilometers from east to west and 28 kilometers from north to south. The elevation is between 200 and 1,400 meters.
Ehime Prefecture
Kōchi Prefecture
Tokushima Prefecture
Ōtoyo has ahumid subtropical climate (KöppenCfa) characterized by warm summers and cool winters with light snowfall. There are significant differences in the weather depending on the topography. but since Ōtoyo is a heavy rainfall area in general, the annual rainfall reaches 3,000mm in some places, causing landslides and other disasters. The annual average temperature is 14 °C.
Per Japanese census data,[2] the population of Ōtoyo has declined precipitously since the 1960s. It is the only municipality in Shikoku where over 50% of the population is aged over 65, therefore qualifying as agenkai shūraku.
| Year | Pop. | ±% |
|---|---|---|
| 1960 | 18,231 | — |
| 1970 | 12,440 | −31.8% |
| 1980 | 9,411 | −24.3% |
| 1990 | 7,760 | −17.5% |
| 2000 | 6,378 | −17.8% |
| 2010 | 4,719 | −26.0% |
| 2020 | 3,252 | −31.1% |
As with all of Kōchi Prefecture, the area of Ōtoyo was part of ancientTosa Province. During theEdo period, the area was part of the holdings ofTosa Domain ruled by theYamauchi clan from their seat atKōchi Castle. The area was organized into villages withinNagaoka District with the creation of the modern municipalities system on April 1, 1889, including Higashitoyonaga, Nishitoyonaga, Ōsugi, and Tentsubo. These four villages merged on March 31, 1955 to form the village of Ōtoyo. The name Ōtoyo came from taking theŌ (大) inŌsugi (大杉,Ōsugi) and theToyo (豊,Toyo) inToyonaga (豊永,Toyonaga). Following this, a section of Ōtoyo was absorbed into the town of Tosayamada (present dayKami, Kōchi). On the April 1, 1972, the village became a town.
Ōtoyo has amayor-council form of government with a directly elected mayor and aunicameral town council of ten members. Ōtoyo, together with the other municipalities of Nagaoka and Tosa Districts, contributes one member to the Kōchi Prefectural Assembly. In terms of national politics, the town is part of Kōchi 1st district of thelower house of theDiet of Japan.
The economy of Ōtoyo is centered on forestry.
Ōtoyo has one public combined elementary/middle school operated by the town government. The town does not have a high school.
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