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Concentration of Population

2018-2-7 | Background |

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The degree of concentration of population from the population census conducted in 2005. The population census includes a survey on densely inhabited districts as well.

According to Wikipedia

"Densely Inhabited Districts" (DID) refers to statistical districts in Japan set in the population census. They are districts which are composed of groups of contiguous population census enumeration districts each of which has a population density of more than 4,000 inhabitants per square kilometer, and the combined population of the contiguous districts exceeds 5,000. However, highly urbanized enumuration districts such as airports, seaports, industrial districts and parks are also included among densely inhabited districts even with small population density. They are used as standards classifying urbanized areas and rural areas and indicating the sizes of urban areas in a narrow sense.

The population census calculates the percentage of the population of each prefecture living in densely inhabited districts, and here, these percentages have been compared as the degree of concentration. While the population density is a simple calculation of population divided by area, the degree of concentration indicates the percentage of people living in densely populated districts, from which the degree of urbanization can be inferred.

The national average degree of concentration is 66.0%. This means that 66% of the population lives in densely inhabited districts. The degree of concentration is highest in Tokyo, with 98%, followed by Osaka, Kanagawa, Kyoto and Saitama. Shimane, with 24.2%, is lowest, followed by Saga, Iwate, Tokushima and Kagawa. Hokkaido which was ranked last in terms of population density is ranked 8th here, indicating that many people in Hokkaido live in densely inhabited districts scattered about its extensive land.

CONCENTRATION OF POPULATION

Source　Population Census (2015)

Rank	Prefectures	Concentration of Population	Standard Score
Sort	Desc Asc	Desc Asc	Desc Asc
1	Tokyo	98.4%	74.50
2	Osaka	95.7%	73.06
3	Kanagawa	94.4%	72.37
4	Kyoto	83.6%	66.60
5	Saitama	80.2%	64.78
6	Hyogo	77.7%	63.44
7	Aichi	77.5%	63.34
8	Hokkaido	75.2%	62.11
9	Chiba	74.3%	61.63
10	Fukuoka	72.4%	60.61
11	Okinawa	67.8%	58.16
12	Nara	64.8%	56.55
13	Hiroshima	64.5%	56.39
14	Miyagi	64.1%	56.18
15	Shizuoka	59.9%	53.94
16	Ehime	52.9%	50.20
17	Ishikawa	51.5%	49.45
18	Shiga	49.7%	48.49
19	Yamaguchi	49.2%	48.22
20	Niigata	48.7%	47.95
21	Nagasaki	48.0%	47.58
22	Kumamoto	47.8%	47.47
23	Oita	47.2%	47.15
24	Okayama	46.7%	46.88
25	Aomori	46.6%	46.83
26	Miyazaki	46.1%	46.56
27	Tochigi	45.2%	46.08
28	Fukui	44.0%	45.44
29	Yamagata	43.7%	45.28
30	Mie	43.5%	45.17
30	Kochi	43.5%	45.17
32	Fukushima	42.6%	44.69
33	Kagoshima	40.2%	43.41
34	Gunma	39.9%	43.25
35	Ibaraki	38.2%	42.34
35	Gifu	38.2%	42.34
37	Toyama	37.8%	42.13
38	Wakayama	37.2%	41.81
39	Tottori	37.0%	41.70
40	Akita	35.0%	40.63
41	Nagano	34.2%	40.21
42	Tokushima	32.7%	39.40
43	Kagawa	32.6%	39.35
44	Iwate	31.9%	38.98
45	Saga	31.4%	38.71
46	Yamanashi	31.2%	38.60
47	Shimane	24.2%	34.86
	Japan	68.3%