Ibigawa 揖斐川町 | |
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.jpg) Ibigawa Town Hall | |
 Flag  Seal | |
 Location of Ibigawa in Gifu Prefecture | |
  Ibigawa | |
| Coordinates:35°29′14.2″N136°34′6.9″E / 35.487278°N 136.568583°E /35.487278; 136.568583 | |
| Country | Japan |
| Region | Chūbu |
| Prefecture | Gifu |
| District | Ibi |
| Government | |
| • Mayor | Takao Sōmiya |
| Area | |
• Total | 803.44 km2 (310.21 sq mi) |
| Population (December 1, 2018) | |
• Total | 21,319 |
| • Density | 27/km2 (69/sq mi) |
| Time zone | UTC+9 (Japan Standard Time) |
| Phone number | 0585-22-2111 |
| Address | Miwa 133, Ibigawa-chō, Ibi-gun, Gifu-ken 501-0692 |
| Climate | Cfa |
| Website | Official website |
| Symbols | |
| Flower | Prunus persica |
| Tree | Japanese Zelkova |
Ibigawa (揖斐川町,Ibigawa-chō) is atown located inIbi District,Gifu Prefecture,Japan. As of 1 December 2018[update], the town had an estimatedpopulation of 21,319 in 8,015 households[1] and apopulation density of 27 persons per km2. The total area of the town was 803.44 square kilometres (310.21 sq mi).
Ibigawa is located in far western Gifu Prefecture, bordering onShiga Prefecture to the west andFukui Prefecture to the north. TheIbi River flows through the town, which is located in a hilly to mountainous area. Parts of the town are within the borders of theIbi-Sekigahara-Yōrō Quasi-National Park.
The town has a climate characterized by hot and humid summers, and mild winters (Köppen climate classificationCfa). The average annual temperature in Ibigawa is 15.5 °C (59.9 °F). The average annual rainfall is 2,517.6 mm (99.12 in) with July as the wettest month. The temperatures are highest on average in August, at around 27.6 °C (81.7 °F), and lowest in January, at around 3.8 °C (38.8 °F).[2] The mountainous areas of the town are noted for extremely heavy snow in winter.
| Climate data for Ibigawa (1991−2020 normals, extremes 1978−present) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 17.7 (63.9) | 20.3 (68.5) | 26.0 (78.8) | 31.2 (88.2) | 34.5 (94.1) | 36.4 (97.5) | 39.6 (103.3) | 39.6 (103.3) | 38.2 (100.8) | 32.6 (90.7) | 25.6 (78.1) | 21.9 (71.4) | 39.6 (103.3) |
| Mean daily maximum °C (°F) | 8.2 (46.8) | 9.4 (48.9) | 13.4 (56.1) | 19.4 (66.9) | 24.5 (76.1) | 27.7 (81.9) | 31.4 (88.5) | 33.0 (91.4) | 28.8 (83.8) | 23.3 (73.9) | 17.1 (62.8) | 10.9 (51.6) | 20.6 (69.1) |
| Daily mean °C (°F) | 3.8 (38.8) | 4.6 (40.3) | 8.2 (46.8) | 13.8 (56.8) | 18.9 (66.0) | 22.7 (72.9) | 26.4 (79.5) | 27.6 (81.7) | 23.8 (74.8) | 18.0 (64.4) | 11.8 (53.2) | 6.2 (43.2) | 15.5 (59.9) |
| Mean daily minimum °C (°F) | 0.0 (32.0) | 0.3 (32.5) | 3.3 (37.9) | 8.5 (47.3) | 13.8 (56.8) | 18.5 (65.3) | 22.7 (72.9) | 23.7 (74.7) | 19.9 (67.8) | 13.7 (56.7) | 7.3 (45.1) | 2.3 (36.1) | 11.2 (52.1) |
| Record low °C (°F) | −7.0 (19.4) | −8.2 (17.2) | −6.2 (20.8) | −0.4 (31.3) | 4.4 (39.9) | 11.4 (52.5) | 16.1 (61.0) | 16.4 (61.5) | 10.7 (51.3) | 2.7 (36.9) | −1.3 (29.7) | −5.9 (21.4) | −8.2 (17.2) |
| Averageprecipitation mm (inches) | 108.8 (4.28) | 105.8 (4.17) | 171.7 (6.76) | 224.1 (8.82) | 279.0 (10.98) | 302.5 (11.91) | 379.4 (14.94) | 213.9 (8.42) | 312.5 (12.30) | 184.3 (7.26) | 112.1 (4.41) | 120.8 (4.76) | 2,517.6 (99.12) |
| Average precipitation days(≥ 1.0 mm) | 12.5 | 10.9 | 11.7 | 10.4 | 10.4 | 12.8 | 14.1 | 11.8 | 12.3 | 9.3 | 9.5 | 13.2 | 138.9 |
| Mean monthlysunshine hours | 136.9 | 147.3 | 183.7 | 196.7 | 197.5 | 149.7 | 156.9 | 192.4 | 155.5 | 160.3 | 143.4 | 131.7 | 1,951.7 |
| Source:Japan Meteorological Agency[3][2] | |||||||||||||
Per Japanese census data,[4] the population of Ibigawa has declined over the past 40 years.
| Year | Pop. | ±% |
|---|---|---|
| 1970 | 29,979 | — |
| 1980 | 31,171 | +4.0% |
| 1990 | 29,156 | −6.5% |
| 2000 | 27,453 | −5.8% |
| 2010 | 23,784 | −13.4% |
| 2020 | 19,529 | −17.9% |
The area around Ibigawa was part of traditionalMino Province. During theEdo period, it initially part of a 30,000koku domain controlled by theNishio clan, but from 1623 was divided between territory controlled byOwari Domain andtenryō holdings directly controlled by theTokugawa shogunate. During the post-Meiji restoration cadastral reforms, the area was organised intoIbi District, Gifu Prefecture. The town of Ibigawa was formed on July 1, 1889 with the establishment of the modern municipalities system.
On January 31, 2005 the former villages ofFujihashi,Kasuga,Kuze,Sakauchi, andTanigumi merged with Ibigawa, resulting in a nearly 20-fold increase in area.
Ibigawa has six public elementary schools and five public middle schools operated by the town government. The town has one public high school operated by the Gifu Prefectural Board of Education.
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