Japan’s 2010 Census: Moving to Tokyo

For years, demographers have been predicting that the population of Japan would begin to decline. The  census of Japan, conducted every five years, however, still continues to show slight population growth, with 288,000 people having been added between 2005 and 2010. This growth was so small that the nation of Japan added fewer people than seven US metropolitan areas (Dallas-Fort Worth, Houston, Washington, Atlanta, Riverside-San Bernardino, Phoenix and Raleigh) and less than the Toronto metropolitan area over the same period of time.

A Less Populous Future: However, the 2010 census figure was higher than the estimates predicted. Still, longer-term projections indicate a substantial population decline. According to the 2010 census, Japan had approximately 128 million people. United Nations projections indicate that by 2050, Japan’s population will fall to 102 million. Although  the extent of urbanization is expected to increase from 68 percent to 80 percent, the overall urban population is expected to decline. This is an astonishing development, in light of the fact that the world urban population is expected to increase by nearly 3 billion over the same period.

The Falling Growth Rate: The decline in Japan’s population growth rate has been precipitous. Between 1970 and 1975, Japan experienced an annual population growth rate of 1.53 percent. This was the fastest growth rate experienced by the nation since 1900, with the exception of the strong growth   immediately after World War II, from 1945 to 1950. After 1975, however growth declined significantly, dropping to 0.89 percent annually between 1975 and 1980 and finally dropping to 0.05 percent annually between 2005 and 2010 (Figure 1).

Tohoku: Population Loss, Earthquake and Tsunami: The largest population losses were in the Tohoku region of northeast Honshu, which is the largest and most highly populated island (more than 80 percent of the population). The population declined there by more than three percent..   However, one of Tohoku’s prefectures, Miyagi, has grown strongly, adding 29 percent to its population since 1970, more than any prefecture outside the Tokyo-Yokohama, Nagoya and Osaka-Kobe-Kyoto areas. All of this, of course, was before the great earthquake and tsunami of March 11, 2011 which severely damaged many communities in Tohoku and took an especially severe toll in Miyagi and its capital, Sendai.

All but two of Japan’s other regions experienced losses between 2000 and 2005, with growth only in Kanto (the broader Tokyo region, consisting of seven prefectures) and the island region (and prefecture) of Okinawa.

Only the prefecture of Aichi  and four prefectures in the Tokyo – Yokohama area added more than 100,000 people. Nagoya is the capital of Aichi prefecture and forms the core of Japan’s third largest urban area. Small gains were also experienced in Osaka Prefecture (capital Osaka), at the core of the Osaka – Kobe – Kyoto urban area, the world’s 12th largest, with a population of 17 million. Shiga prefecture, halfway between Nagoya and Osaka grew slightly, as did Fukuoka prefecture, home of the Fukuoka and Kitakyushu urban areas.

Population losses were sustained in 38 of Japan’s 47 prefectures between 2005 and 2010 (Table). In contrast, during the much faster growing period of 1975 to 1980, 46 of Japan’s 47 prefectures gained   (Figure 2). Indeed, the only prefecture losing population during that period was Tokyo (includes the 23 wards of the former city of Tokyo and the "tama" suburbs), which was the nation’s fastest-growing prefecture during the last census period.

Japan Population Trends by Region and Prefecture, 1970-2010
 
1970 2000 2005 2010 Change Change from 2005 Share of Growth from 1970 Change from 1970
JAPAN 104,663 126,926 127,768 128,056 288 0.2% 100.0% 22.4%
REGION:Prefecture
HOKKAIDO 5,184 5,683 5,628 5,507 -120 -2.1% 1.4% 6.2%
Hokkaido 5,184 5,683 5,628 5,507 -120 -2.1% 1.4% 6.2%
TOHOKU 9,031 9,818 9,635 9,335 -300 -3.1% 1.3% 3.4%
Aomori 1,428 1,476 1,437 1,373 -63 -4.4% -0.2% -3.8%
Iwate 1,371 1,416 1,385 1,331 -55 -3.9% -0.2% -3.0%
Miyagi 1,819 2,365 2,360 2,348 -12 -0.5% 2.3% 29.1%
Akita 1,241 1,189 1,146 1,086 -60 -5.2% -0.7% -12.5%
Yamagata 1,226 1,244 1,216 1,169 -47 -3.9% -0.2% -4.7%
Fukushima 1,946 2,127 2,091 2,029 -63 -3.0% 0.4% 4.3%
KANTO 29,496 40,434 41,495 42,607 1,113 2.7% 56.0% 44.5%
Ibaraki 2,144 2,986 2,975 2,969 -6 -0.2% 3.5% 38.5%
Tochigi 1,580 2,005 2,017 2,007 -10 -0.5% 1.8% 27.0%
Gumma 1,659 2,025 2,024 2,008 -16 -0.8% 1.5% 21.0%
Saitama 3,866 6,938 7,054 7,195 141 2.0% 14.2% 86.1%
Chiba 3,367 5,926 6,056 6,217 161 2.7% 12.2% 84.6%
Tokyo 11,408 12,064 12,577 13,162 585 4.7% 7.5% 15.4%
Kanagawa 5,472 8,490 8,792 9,050 258 2.9% 15.3% 65.4%
CHUBU 18,091 21,628 21,774 21,715 -59 -0.3% 15.5% 20.0%
Niigata 2,361 2,476 2,431 2,375 -57 -2.3% 0.1% 0.6%
Toyama 1,030 1,121 1,112 1,093 -18 -1.7% 0.3% 6.2%
Ishikawa 1,002 1,181 1,174 1,170 -4 -0.3% 0.7% 16.8%
Fukui 744 829 822 806 -15 -1.8% 0.3% 8.4%
Yamanashi 762 888 885 863 -22 -2.5% 0.4% 13.2%
Nagano 1,957 2,215 2,196 2,153 -43 -2.0% 0.8% 10.0%
Gifu 1,759 2,108 2,107 2,081 -26 -1.2% 1.4% 18.3%
Shizuoka 3,090 3,767 3,792 3,765 -27 -0.7% 2.9% 21.8%
Aichi 5,386 7,043 7,255 7,408 154 2.1% 8.6% 37.6%
KANSAI 18,944 22,713 22,760 22,755 -5 0.0% 16.3% 20.1%
Mie 1,543 1,857 1,867 1,855 -12 -0.7% 1.3% 20.2%
Shiga 890 1,343 1,380 1,410 30 2.2% 2.2% 58.5%
Kyoto 2,250 2,644 2,648 2,637 -11 -0.4% 1.7% 17.2%
Osaka 7,620 8,805 8,817 8,863 46 0.5% 5.3% 16.3%
Hyogo 4,668 5,551 5,591 5,589 -1 0.0% 3.9% 19.7%
Nara 930 1,443 1,421 1,400 -21 -1.5% 2.0% 50.5%
Wakayama 1,043 1,070 1,036 1,001 -35 -3.4% -0.2% -4.0%
CHUGOKU 6,997 7,732 7,676 7,562 -114 -1.5% 2.4% 8.1%
Tottori 569 613 607 588 -19 -3.1% 0.1% 3.4%
Shimane 774 762 742 716 -26 -3.5% -0.2% -7.4%
Okayama 1,707 1,951 1,957 1,945 -12 -0.6% 1.0% 13.9%
Hiroshima 2,436 2,879 2,877 2,861 -16 -0.6% 1.8% 17.4%
Yamaguchi 1,511 1,528 1,493 1,451 -41 -2.8% -0.3% -3.9%
SHIKOKU 3,904 4,154 4,086 3,977 -109 -2.7% 0.3% 1.9%
Tokushima 791 824 810 786 -24 -3.0% 0.0% -0.6%
Kagawa 908 1,023 1,012 996 -17 -1.6% 0.4% 9.7%
Ehime 1,418 1,493 1,468 1,431 -37 -2.5% 0.1% 0.9%
Kochi 787 814 796 765 -32 -4.0% -0.1% -2.8%
KYUSHU 12,071 13,446 13,353 13,204 -148 -1.1% 4.8% 9.4%
Fukuoka 4,027 5,016 5,050 5,073 23 0.5% 4.5% 26.0%
Saga 838 877 866 850 -17 -1.9% 0.1% 1.4%
Nagasaki 1,570 1,517 1,479 1,427 -52 -3.5% -0.6% -9.1%
Kumamoto 1,700 1,859 1,842 1,817 -25 -1.3% 0.5% 6.9%
Oita 1,156 1,221 1,210 1,196 -13 -1.1% 0.2% 3.5%
Miyazaki 1,051 1,170 1,153 1,135 -18 -1.6% 0.4% 8.0%
Kagoshima 1,729 1,786 1,753 1,706 -47 -2.7% -0.1% -1.3%
OKINAWA 945 1,318 1,362 1,393 31 2.3% 1.9% 47.4%
Okinawa 945 1,318 1,362 1,393 31 2.3% 1.9% 47.4%
In thousands
Data from Japan Statistics Bureau

 

Moving to Tokyo: Since 1970, 56 percent of Japan’s growth has been in the Kanto region, which includes Tokyo. During the last five years, all of Japan’s growth took place in the core of the Tokyo – Yokohama region. This includes the suburban prefectures of Chiba, Kanagawa and Saitama, along with the prefecture of Tokyo.  These four prefectures added 1.14 million people, nearly 4 times the population gain of the entire country. Tokyo is the national capital and forms the world’s largest urban area, with 37 million people.  

Different Urban Areas: Different Fates: The fortunes of the prefectures in Japan’s two largest urban areas could hardly be more different. The four prefectures of the Tokyo – Yokohama area had added approximately 3,000,000 people in each five-year period until 1975. Since that time, growth has been slower, but the area has added 1 million or more people each five years from 1975 to 2010. On the other hand, the Osaka – Kobe – Kyoto area (Osaka, Hyogo, Kyoto and Nara prefectures), which also experienced strong growth after World War II, adding between one and two million people in each five year period until 1975, has seen its growth come to a virtual standstill. Over the past five years, Osaka – Kobe – Kyoto added only 12,000 people (Figure 3). As a result, Osaka – Kobe – Kyoto is easily the slowest growing mega-city in the world, by far.   Osaka – Kobe – Kyoto seems destined to fall substantially in world urban area rankings in the years to come. Tokyo – Yokohama, however, remains at least 14 million larger than any other urban area in the world, a margin that seems likely to be secure for decades to come.

The Impetus for Decentralization: These numbers suggest there is ample reason to worry about the concentration of population and power in the Tokyo – Yokohama area, which now contains nearly 30 percent of the nation’s population. None of the world’s largest nations, outside of Korea (which ranks 25th in population), are so concentrated in one urban area. Among other nations with more than 100 million the greatest concentration is in Mexico, where Mexico City accounts for less than 20 percent of the population. The largest urban areas in Brazil (Sao Paulo) and Russia (Moscow) have little more than 10 percent of the population. The largest urban area in the United States, New York, accounts for less than seven percent of the population, while in China (Shanghai) and India (Delhi), the largest urban areas house less than two percent of the population (Figure 4). Paris, the beneficiary of centuries of centralization, has less than 20 percent of the population.  

Moving Away from Tokyo? There had long been proposals to move the national capital, but were not implemented, at least in partly because of Japan’s two decade-long economic difficulties. However, after the great earthquake and tsunami, these calls have been revived. One proposal would establish a series of auxiliary capitals around the nation, rather than simply moving the capital from Tokyo. Proponents have indicated concern that a major earthquake and tsunami in the Tokyo – Yokohama area could be far more damaging than the recent disaster in Tohoku. A recent proposal by former Japanese Chief Cabinet Secretary Yasuhisa Shiozaki (formerly the second ranking official in the national government) called on Japan to move parliament (the Diet) to the Fukushima area, near the damaged nuclear power plant as a part of a decentralization strategy.

Despite these concerns, decentralization will be no easy matter. Moving the government would require a huge political shift, and that would just be the beginning. Shifting the commercial base and the population could well prove impossible.

Nonetheless, the results of the 2010 census provide strong support for decentralization, a message that has been telegraphed by the earthquake and tsunami of March 11.

Photo: Kyoto (by Jean Love)

Wendell Cox is a Visiting Professor, Conservatoire National des Arts et Metiers, Paris and the author of “War on the Dream: How Anti-Sprawl Policy Threatens the Quality of Life

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