Hollowing phenomenon - Hollowing phenomenon

Japanese: 空洞化現象 - くうどうかげんしょう
Hollowing phenomenon - Hollowing phenomenon

...This is a phenomenon in which the permanent population (nighttime population) in the center of a city decreases while the surrounding areas experience a notable population increase. It is commonly referred to as this phenomenon because the distribution of population increases and decreases resembles a doughnut. It is also called the hollowing out of urban centers. The population of the entire Tokyo wards and Osaka City is decreasing, but in recent years, population decreases and hollowing out of the center of mid-sized cities have also been observed.

*Some of the terminology that refers to the "hollowing out phenomenon" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…都市中心部の常住人口(夜間人口)が減少し,これを取り囲む周辺部に顕著な人口増加がみられる現象で,人口増減の分布がドーナツに似ているため,このように俗称される。都心人口の空洞化現象ともいう。東京都区部や大阪市では全域の人口が減少している形であるが,近年では中規模都市でも中心部の人口減少,空洞化がみられるようになってきた。…

※「空洞化現象」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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