Introduction
City in Chūgoku, JapanManiwa
真庭市CityView of Hiruzen Plateau
FlagEmblemInteractive map of ManiwaManiwaLocation in JapanCoordinates: 35°4′33″N 133°45′9″E / 35.07583°N 133.75250°E / 35.07583; 133.75250CountryJapanRegionChūgoku (San'yō)PrefectureOkayamaGovernment • MayorNoboru Ota (since April 2013)Area • Total828.53 km2 (319.90 sq mi)Population (February 1, 2023) • Total42,477 • Density51.268/km2 (132.78/sq mi)Time zoneUTC+09:00 (JST)City hall address2927-2 Kuse, Maniwa-shi, Okayama-ken 719-3292WebsiteOfficial websiteSymbolsFlowerCherry blossomTreeChamaecyparis obtusa
Maniwa City Hall
Aerial view of Kuse area of Maniwa
Maniwa (真庭市, Maniwa-shi) is a city located in Okayama Prefecture, Japan. As of 1 February 2023[update], the city had an estimated population of 42,477 in 17568 households and a population density of 51 persons per km2. The total area of the city is 828.53 square kilometres (319.90 sq mi).
Geography
[edit]
Maniwa is located in north-central Okayama Prefecture and is approximately in the center of the Chūgoku Mountains, which forms its northern border with Tottori Prefecture. Occupying 11.6% of Okayama Prefecture, it has the largest area of any municipality in the prefecture. It measures roughly 55 km from North to South, and 35 km from east to west. The mountainous part of the city to the north is dominated by Mount Hiruzen (1,202 m (3,944 ft)) and the Hiruzen Highlands, which is the source of the Asahi River, emerges from Mount Hiruzen in Maniwa, and its upper reaches are located within the town. The river has approximately 146 tributaries and a length of 142 kilometres (88 mi). Major tributaries of the Asahi in Maniwa include the Bitchū, Nakazui, Kōchi, Meki, and the Shinjō rivers. The Hiruzen Highlands sit at an elevation of 500–600 meters above sea-level, and is part of the Daisen-Oki National Park. With Maniwa being far from any major fault lines, the chance of an earthquake above 7.0 magnitude is less than 1%, small compared to other areas of Japan.
Dams
Hokubo Dam
Yubara Dam
Lakes
Lake Yubara
Adjoining municipalities[edit]
Okayama Prefecture
Kagamino
Kibichūō
Misaki
Niimi
Shinjō
Takahashi
Tsuyama
Tottori Prefecture
Kōfu
Kurayoshi
Misasa
Climate[edit]
Maniwa's climate varies greatly from north to south. The Hiruzen Highlands up north, due to being at a higher elevation, tend to be much cooler in the summer, with heavy snow in the winter, and temperatures often dropping into the negatives. However, further down south in Kuse to Hokubo, snow may fall in the winter but rarely accumulates, but the summers are hotter in comparison to Hiruzen.
Maniwa is also situated far in land, which means that typhoons often do not affect it as badly as seaside towns in Okayama. The mountains throughout the town create a barrier from extremely heavy winds, and so often rain is the biggest side effect of any typhoons passing nearby.
Climate data for Kuse, Maniwa (1991−2020 normals, extremes 1978−present)
Month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Record high °C (°F)
16.7(62.1)
21.8(71.2)
26.4(79.5)
32.4(90.3)
33.7(92.7)
36.7(98.1)
37.9(100.2)
39.3(102.7)
36.8(98.2)
31.8(89.2)
26.0(78.8)
20.5(68.9)
39.3(102.7)
Mean daily maximum °C (°F)
7.4(45.3)
8.7(47.7)
13.0(55.4)
19.5(67.1)
24.6(76.3)
27.4(81.3)
31.1(88.0)
32.6(90.7)
27.9(82.2)
22.1(71.8)
15.7(60.3)
9.7(49.5)
20.0(68.0)
Daily mean °C (°F)
2.2(36.0)
3.0(37.4)
6.4(43.5)
12.1(53.8)
17.4(63.3)
21.4(70.5)
25.4(77.7)
26.2(79.2)
21.9(71.4)
15.6(60.1)
9.4(48.9)
4.2(39.6)
13.8(56.8)
Mean daily minimum °C (°F)
−1.5(29.3)
−1.3(29.7)
1.1(34.0)
5.6(42.1)
11.1(52.0)
16.6(61.9)
21.2(70.2)
21.9(71.4)
17.6(63.7)
10.9(51.6)
5.0(41.0)
0.5(32.9)
9.1(48.3)
Record low °C (°F)
−10.9(12.4)
−10.6(12.9)
−7.0(19.4)
−3.1(26.4)
0.0(32.0)
5.8(42.4)
11.0(51.8)
14.4(57.9)
5.4(41.7)
0.7(33.3)
−2.7(27.1)
−8.5(16.7)
−10.9(12.4)
Average precipitation mm (inches)
58.1(2.29)
63.6(2.50)
104.0(4.09)
113.9(4.48)
142.5(5.61)
185.1(7.29)
241.5(9.51)
135.3(5.33)
183.2(7.21)
102.6(4.04)
62.8(2.47)
64.5(2.54)
1,457.2(57.37)
Average precipitation days (≥ 1.0 mm)
9.8
10.5
11.7
9.8
10.4
11.7
13.0
9.8
10.2
7.7
7.6
9.7
121.9
Mean monthly sunshine hours
102.8
116.6
157.0
182.1
190.6
140.9
139.9
174.1
144.8
151.3
120.2
102.7
1,722.9
Source: Japan Meteorological Agency
Climate data for Yatsuka, Maniwa (1991−2020 normals, extremes 1978−present)
Month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Record high °C (°F)
15.0(59.0)
18.7(65.7)
23.5(74.3)
30.9(87.6)
30.3(86.5)
32.8(91.0)
34.5(94.1)
34.9(94.8)
33.2(91.8)
30.0(86.0)
23.8(74.8)
18.7(65.7)
34.9(94.8)
Mean daily maximum °C (°F)
4.3(39.7)
5.2(41.4)
9.7(49.5)
16.4(61.5)
21.3(70.3)
24.1(75.4)
27.8(82.0)
29.0(84.2)
24.4(75.9)
19.1(66.4)
13.5(56.3)
7.3(45.1)
16.8(62.3)
Daily mean °C (°F)
0.3(32.5)
0.7(33.3)
4.1(39.4)
9.6(49.3)
14.7(58.5)
18.8(65.8)
23.0(73.4)
23.7(74.7)
19.4(66.9)
13.3(55.9)
7.8(46.0)
2.7(36.9)
11.5(52.7)
Mean daily minimum °C (°F)
−3.5(25.7)
−3.7(25.3)
−1.2(29.8)
2.9(37.2)
8.4(47.1)
14.2(57.6)
19.3(66.7)
19.8(67.6)
15.3(59.5)
8.4(47.1)
2.8(37.0)
−1.4(29.5)
6.8(44.2)
Record low °C (°F)
−15.8(3.6)
−20.2(−4.4)
−14.1(6.6)
−7.3(18.9)
−4.1(24.6)
1.7(35.1)
7.0(44.6)
10.5(50.9)
0.9(33.6)
−3.2(26.2)
−6.1(21.0)
−13.4(7.9)
−20.2(−4.4)
Average precipitation mm (inches)
174.0(6.85)
152.4(6.00)
161.7(6.37)
126.7(4.99)
142.3(5.60)
181.3(7.14)
252.3(9.93)
168.4(6.63)
275.3(10.84)
187.4(7.38)
142.2(5.60)
162.3(6.39)
2,126.4(83.72)
Average snowfall cm (inches)
189(74)
169(67)
67(26)
1(0.4)
0(0)
0(0)
0(0)
0(0)
0(0)
0(0)
2(0.8)
94(37)
511(201)
Average precipitation days (≥ 1.0 mm)
19.2
16.4
16.0
12.3
11.2
12.6
14.4
11.5
13.5
12.0
14.1
17.9
171.1
Average snowy days (≥ 3 cm)
15.5
13.3
6.9
0.1
0
0
0
0
0
0
0.2
7.2
43.2
Mean monthly sunshine hours
47.6
57.8
123.4
171.5
191.7
141.7
137.5
167.2
120.6
123.8
95.5
68.2
1,446.4
Source: Japan Meteorological Agency
Demographics[edit]
Per Japanese census data, the population of Maniwa in 2020 is 42,725 people. Maniwa has been conducting censuses since 1920.
Historical populationYearPop.±% 1920 64,520—     1925 64,727+0.3% 1930 66,933+3.4% 1935 68,819+2.8% 1940 68,902+0.1% 1945 84,235+22.3% 1950 84,513+0.3% 1955 82,575−2.3% 1960 76,198−7.7% 1965 68,419−10.2% 1970 62,608−8.5% 1975 61,152−2.3% 1980 60,586−0.9% 1985 60,196−0.6% 1990 58,754−2.4% 1995 56,607−3.7% 2000 54,747−3.3% 2005 51,782−5.4% 2010 48,976−5.4% 2015 46,124−5.8% 2020 42,725−7.4%Maniwa population statistics