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Population in Japan compared to Mauritania: Trends, Charts, Rankings

Updated on by Georank team

The latest officially reported population of Japan was 123,975,371 in 2024 vs 5,169,395 people in Mauritania in 2024. In 2026, based on the adjusted UN estimation, the current Japan's population is 122,677,250 people compared to 5,505,206 in Mauritania.

Population statistics:

  • Japan's population is 22.3 times bigger than Mauritania's.
  • Japan is ranked the 12th most populous country in the world, while Mauritania is the 122nd.
  • The countries together account for 1.55% of the world: 1.48% for Japan vs 0.07% for Mauritania.
  • For the last 10 years, Japan has had an average growth rate of -0.25% per year vs +3% in Mauritania.
  • Since 2006, the population of Japan has decreased from 128M people to 123M (4.05% decline), while Mauritania has grown from 3.01M to 5.51M (82.7% growth).

Japan vs Mauritania: population by year and forecast

Japan
Factual

Projection
Mauritania
Factual

Projection
1x
Year Population
Japan Mauritania
2100 76,978,998 17,309,980
2099 77,363,458 17,202,690
2098 77,742,445 17,090,030
2097 78,118,375 16,975,270
2096 78,498,614 16,857,252
2095 78,875,245 16,739,240
2094 79,250,325 16,617,272
2093 79,628,057 16,492,589
2092 80,007,967 16,366,098
2091 80,383,529 16,235,771
2090 80,760,724 16,103,700
2089 81,140,553 15,969,059
2088 81,521,696 15,831,339
2087 81,908,373 15,690,143
2086 82,304,497 15,547,605
2085 82,709,534 15,403,967
2084 83,123,058 15,257,740
2083 83,544,006 15,108,271
2082 83,980,325 14,958,279
2081 84,429,305 14,805,332
2080 84,899,768 14,651,508
2079 85,387,247 14,496,397
2078 85,897,934 14,337,117
2077 86,434,291 14,175,812
2076 86,993,007 14,013,255
2075 87,577,777 13,849,027
2074 88,190,392 13,684,146
2073 88,834,763 13,517,681
2072 89,499,356 13,349,376
2071 90,184,464 13,178,237
2070 90,899,136 13,007,812
2069 91,625,421 12,835,311
2068 92,367,969 12,662,862
2067 93,113,499 12,487,379
2066 93,869,240 12,311,503
2065 94,633,430 12,136,616
2064 95,391,433 11,958,955
2063 96,148,081 11,783,144
2062 96,902,907 11,606,044
2061 97,654,031 11,428,738
2060 98,400,894 11,251,427
2059 99,144,216 11,072,236
2058 99,868,968 10,892,076
2057 100,585,601 10,713,858
2056 101,295,868 10,536,935
2055 101,989,736 10,358,532
2054 102,683,462 10,179,658
2053 103,359,083 9,999,712
2052 104,036,901 9,819,098
2051 104,706,698 9,639,209
2050 105,377,283 9,461,249
2049 106,053,011 9,283,353
2048 106,731,207 9,104,299
2047 107,419,237 8,926,851
2046 108,115,358 8,748,845
2045 108,820,982 8,572,397
2044 109,529,333 8,397,189
2043 110,245,586 8,222,194
2042 110,968,174 8,048,139
2041 111,704,629 7,876,803
2040 112,438,759 7,706,696
2039 113,175,948 7,537,689
2038 113,915,783 7,369,184
2037 114,662,374 7,202,472
2036 115,410,956 7,036,729
2035 116,162,381 6,871,981
2034 116,911,001 6,708,364
2033 117,652,676 6,546,168
2032 118,393,188 6,385,827
2031 119,127,425 6,227,564
2030 119,856,131 6,070,865
2029 120,574,242 5,916,516
2028 121,287,543 5,764,060
2027 121,989,133 5,613,919
2026 122,677,250 5,464,898
2025 123,339,586 5,317,228
2024 123,975,371 5,169,395
2023 124,516,650 5,022,441
2022 125,124,989 4,875,637
2021 125,681,593 4,734,874
2020 126,261,000 4,600,131
2019 126,633,000 4,467,708
2018 126,811,000 4,337,685
2017 126,972,000 4,210,600
2016 127,076,000 4,086,657
2015 127,141,000 3,965,959
2014 127,276,000 3,848,514
2013 127,445,000 3,734,318
2012 127,629,000 3,619,034
2011 127,833,000 3,502,811
2010 128,070,000 3,390,965
2009 128,047,000 3,284,448
2008 128,063,000 3,183,269
2007 128,001,000 3,093,059
2006 127,854,000 3,013,660
2005 127,773,000 2,939,059
2004 127,761,000 2,868,664
2003 127,718,000 2,802,046
2002 127,445,000 2,738,655
2001 127,149,000 2,678,760
2000 126,843,000 2,613,441
1999 126,631,000 2,541,698
1998 126,400,000 2,474,651
1997 126,057,000 2,411,306
1996 125,757,000 2,358,188
1995 125,472,000 2,312,017
1994 125,178,000 2,249,454
1993 124,829,000 2,174,328
1992 124,425,000 2,088,135
1991 123,964,000 2,009,738
1990 123,478,000 1,951,878
1989 123,069,000 1,903,048
1988 122,578,000 1,855,859
1987 122,069,000 1,803,014
1986 121,482,000 1,751,835
1985 120,837,000 1,702,107
1984 120,083,000 1,653,693
1983 119,307,000 1,606,746
1982 118,480,000 1,561,176
1981 117,661,000 1,516,877
1980 116,807,000 1,474,043
1979 115,890,000 1,432,758
1978 114,913,000 1,392,713
1977 113,872,000 1,353,768
1976 112,775,000 1,315,336
1975 111,573,000 1,277,330
1974 110,162,000 1,240,188
1973 108,707,000 1,203,838
1972 107,188,000 1,168,355
1971 105,697,000 1,133,702
1970 103,403,000 1,099,806
1969 102,219,000 1,066,754
1968 101,011,000 1,034,739
1967 99,879,000 1,003,843
1966 98,851,000 974,157
1965 97,952,000 945,838
1964 96,903,000 918,955
1963 95,900,000 893,423
1962 94,933,000 869,184
1961 94,055,000 846,167
1960 93,216,000 824,298

Data sources: United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10); World Bank | Health (1960–2024, retrieved 2026-04-06).

GeoRank.org/population/japan/mauritania | CC BY

From 2006 to 2016, the population of Japan decreased by 778,000 people (a 0.61% decline), while Mauritania gained 1,072,997 people (a 35.6% growth).

For the next 10 years, from 2016 to 2026, Japan lost 4,398,750 people (a 3.46% decline), while Mauritania's population increased by 1,418,549 people (a 34.7% growth).

Japan was ranked 10th most populous country in 2006 and is 12th in 2026. Mauritania was ranked 132nd in 2006 and ranked 122nd now.

The UN's World Population Prospects forecasts that in 24 years (in 2050) Japan's population will shrink by 14.1% to 105,377,283 people with a rank change from 12th to 17th. The population of Mauritania will increase by 71.9% to 9,461,249 people and rank change from 122nd to 102nd.

Mauritania is projected to reach its peak in 2100 at 17.3M people, while Japan's population already peaked in 2010 at 128M people and is projected to decrease to 77M people by 2100.

Population growth rate by year

Japan
Factual

Projection
Mauritania
Factual

Projection
1x
Year Growth rate
Japan Mauritania
2100 -0.5% 0.62%
2099 -0.49% 0.66%
2098 -0.48% 0.68%
2097 -0.48% 0.7%
2096 -0.48% 0.7%
2095 -0.47% 0.73%
2094 -0.47% 0.76%
2093 -0.47% 0.77%
2092 -0.47% 0.8%
2091 -0.47% 0.82%
2090 -0.47% 0.84%
2089 -0.47% 0.87%
2088 -0.47% 0.9%
2087 -0.48% 0.92%
2086 -0.49% 0.93%
2085 -0.5% 0.96%
2084 -0.5% 0.99%
2083 -0.52% 1%
2082 -0.53% 1.03%
2081 -0.55% 1.05%
2080 -0.57% 1.07%
2079 -0.59% 1.11%
2078 -0.62% 1.14%
2077 -0.64% 1.16%
2076 -0.67% 1.19%
2075 -0.69% 1.2%
2074 -0.73% 1.23%
2073 -0.74% 1.26%
2072 -0.76% 1.3%
2071 -0.79% 1.31%
2070 -0.79% 1.34%
2069 -0.8% 1.36%
2068 -0.8% 1.41%
2067 -0.81% 1.43%
2066 -0.81% 1.44%
2065 -0.79% 1.49%
2064 -0.79% 1.49%
2063 -0.78% 1.53%
2062 -0.77% 1.55%
2061 -0.76% 1.58%
2060 -0.75% 1.62%
2059 -0.73% 1.65%
2058 -0.71% 1.66%
2057 -0.7% 1.68%
2056 -0.68% 1.72%
2055 -0.68% 1.76%
2054 -0.65% 1.8%
2053 -0.65% 1.84%
2052 -0.64% 1.87%
2051 -0.64% 1.88%
2050 -0.64% 1.92%
2049 -0.64% 1.97%
2048 -0.64% 1.99%
2047 -0.64% 2.03%
2046 -0.65% 2.06%
2045 -0.65% 2.09%
2044 -0.65% 2.13%
2043 -0.65% 2.16%
2042 -0.66% 2.18%
2041 -0.65% 2.21%
2040 -0.65% 2.24%
2039 -0.65% 2.29%
2038 -0.65% 2.31%
2037 -0.65% 2.36%
2036 -0.65% 2.4%
2035 -0.64% 2.44%
2034 -0.63% 2.48%
2033 -0.63% 2.51%
2032 -0.62% 2.54%
2031 -0.61% 2.58%
2030 -0.6% 2.61%
2029 -0.59% 2.64%
2028 -0.58% 2.67%
2027 -0.56% 2.73%
2026 -0.54% 2.78%
2025 -0.51% 2.86%
2024 -0.43% 2.93%
2023 -0.49% 3.01%
2022 -0.44% 2.97%
2021 -0.46% 2.93%
2020 -0.29% 2.96%
2019 -0.14% 3%
2018 -0.13% 3.02%
2017 -0.08% 3.03%
2016 -0.05% 3.04%
2015 -0.11% 3.05%
2014 -0.13% 3.06%
2013 -0.14% 3.19%
2012 -0.16% 3.32%
2011 -0.19% 3.3%
2010 0.02% 3.24%
2009 -0.01% 3.18%
2008 0.05% 2.92%
2007 0.11% 2.63%
2006 0.06% 2.54%
2005 0.009% 2.45%
2004 0.03% 2.38%
2003 0.21% 2.31%
2002 0.23% 2.24%
2001 0.24% 2.5%
2000 0.17% 2.82%
1999 0.18% 2.71%
1998 0.27% 2.63%
1997 0.24% 2.25%
1996 0.23% 2%
1995 0.23% 2.78%
1994 0.28% 3.46%
1993 0.32% 4.13%
1992 0.37% 3.9%
1991 0.39% 2.96%
1990 0.33% 2.57%
1989 0.4% 2.54%
1988 0.42% 2.93%
1987 0.48% 2.92%
1986 0.53% 2.92%
1985 0.63% 2.93%
1984 0.65% 2.92%
1983 0.7% 2.92%
1982 0.7% 2.92%
1981 0.73% 2.91%
1980 0.79% 2.88%
1979 0.85% 2.88%
1978 0.91% 2.88%
1977 0.97% 2.92%
1976 1.08% 2.98%
1975 1.28% 2.99%
1974 1.34% 3.02%
1973 1.42% 3.04%
1972 1.41% 3.06%
1971 2.22% 3.08%
1970 1.16% 3.1%
1969 1.2% 3.09%
1968 1.13% 3.08%
1967 1.04% 3.05%
1966 0.92% 2.99%
1965 1.08% 2.93%
1964 1.05% 2.86%
1963 1.02% 2.79%
1962 0.93% 2.72%
1961 0.9% 2.65%

Data sources: United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10); World Bank | Health (1961–2024, retrieved 2026-04-06).

GeoRank.org/population/japan/mauritania | CC BY

In 2024, the population of Japan declined by 0.43%, while Mauritania's population grew by 2.93%.

Live population counters

Japan Mauritania
Current population
122677250
5505206
Population rank 12/197 122/197
Percent of world population 1.48% 0.07%
One net population change
58.3 seconds
3.58 minutes
One birth every
42.2 seconds
3.04 minutes
One death every
19.5 seconds
19 minutes
Daily growth/decline -1,483 +403
Annual growth/decline -541,279 +146,954
Annual growth/decline rate -0.43% +2.93%
Population growth rate rank 185/197 17/197
One migration net change every
3.75 minutes
1.74 hours
Annual migration change +140,579 -5,044
Net migration rank 10/196 115/196
Foreign-born residents 3,409,529 195,937
Foreign-born residents rank 19/195 113/195
Foreign-born share of population 2.8% 3.8%
Foreign-born share rank 120/195 107/195

Natural population change vs migration

Japan
Natural

Migration
Mauritania
Natural

Migration
1x
Year Population change
Japan Mauritania
Natural Migration Natural Migration
2025 - 140,579 - -5,044
2024 - 153,357 - -2,185
2023 -871,617 175,003 145,164 2,999
2022 -825,825 175,003 142,451 2,999
2021 -640,976 -34,996 137,557 -1,483
2020 -542,923 42,001 134,899 -1,483
2019 -531,858 318,190 134,460 -3,019
2018 -456,520 320,601 131,584 -2,987
2017 -406,310 322,564 128,562 -3,001
2016 -343,106 314,732 125,342 -3,008
2015 -292,424 168,896 122,092 -3,019
2014 -267,279 58,109 118,792 -2,980
2013 -242,146 66,449 115,558 -2,987
2012 -229,733 67,904 113,489 4,515
2011 -204,533 97,720 111,165 3,272
2010 -128,070 131,860 108,121 1,128
2009 -76,828 125,450 105,273 -1,481
2008 -51,225 142,605 102,432 -3,860
2007 -25,600 138,024 98,895 -17,048
2006 12,785 130,065 94,991 -18,033
2005 -25,554 113,017 90,940 -18,693
2004 76,656 69,014 87,578 -19,042
2003 114,946 74,875 83,804 -19,104
2002 178,423 60,864 80,993 -18,903
2001 203,438 59,563 78,769 -21,067
2000 228,317 23,468 75,929 -2,997
1999 202,610 56,901 73,554 -2,999
1998 265,440 45,912 72,045 -8,504
1997 277,325 43,366 71,327 -8,187
1996 314,392 25,030 71,939 -28,840
1995 276,039 87,714 72,244 -22,997
1994 363,017 154,214 70,570 5,304
1993 312,073 168,836 68,167 6,217
1992 360,833 170,878 63,501 34,505
1991 396,685 161,331 61,782 -2,997
1990 407,478 124,582 59,934 -3,000
1989 467,662 31,202 58,666 -17,941
1988 527,085 51,154 56,654 -2,997
1987 598,138 28,001 55,037 -2,998
1986 631,706 27,987 53,313 -2,998
1985 676,687 -141,323 52,125 -2,998
1984 756,523 -273,686 50,705 -2,998
1983 775,495 -269,755 49,187 -2,998
1982 805,664 -288,550 47,947 -2,998
1981 811,861 -278,525 46,641 -2,998
1980 864,372 -92,314 45,026 -2,997
1979 950,298 -57,692 43,537 -2,997
1978 1,011,234 -47,996 42,539 -2,998
1977 1,070,397 -49,082 41,352 -2,999
1976 1,127,750 -34,976 40,149 -1,645
1975 1,204,989 107 38,975 -1,472
1974 1,332,960 -10,145 38,106 -1,321
1973 1,391,449 -34,674 37,122 -1,201
1972 1,372,006 -73,980 36,184 -1,139
1971 1,331,782 -107,778 35,279 -1,014
1970 1,230,496 33,731 34,382 -855
1969 1,195,962 49,447 33,252 -688
1968 1,191,930 43,593 32,029 -565
1967 1,258,475 29,632 30,853 -514
1966 682,072 68,934 29,502 -466
1965 1,126,448 -50,667 28,028 -434
1964 1,046,553 -100,696 26,565 -390
1963 987,770 -100,742 25,250 -362
1962 901,864 -57,075 23,927 -342
1961 893,522 -58,882 22,781 -332
1960 894,874 -150,371 21,604 -318

Data sources: World Bank | Health (1960–2025, retrieved 2026-04-06).

GeoRank.org/population/japan/mauritania | CC BY

Over the last 10 years, 73.6% of the population change in Japan is from natural causes (a loss of 5,178,838 people) and 26.4% is from migration (a gain of 1,860,103 people). In Mauritania 98.9% is from natural causes (a gain of 1,320,903 people) and 1.12% is from migration (a loss of 14,982 people).

As of 2024, 3,409,529 residents or 2.8% of the population were not native-born in Japan, compared to 195,937 people or 3.8% in Mauritania.

Biggest cities by population

Japan
City Population
Tokyo 14.3M
Yokohama 3.76M
Osaka 2.75M
Nagoya 2.33M
Sapporo 1.96M
Fukuoka 1.6M
Kawasaki 1.54M
Kobe 1.52M
Kyoto 1.46M
Saitama 1.33M
Mauritania
City Population
Nouakchott 1.45M
Rosso 61.2K

Compare countries by 7 more topics

Population map with other countries

1x

Data sources: World Bank | Health (1960–2024, retrieved 2026-04-06); United Nations | World Population Prospects (1960–2026, retrieved 2026-03-10); U.S. Census Bureau (1960–2025, retrieved 2026-02-08); Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-02-20).

GeoRank.org/population/japan/mauritania | CC BY

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Data sources:

  1. World Bank | Health (1960–2025, retrieved 2026-04-06)
  2. United Nations | World Population Prospects (1960–2100, retrieved 2026-03-10)
  3. U.S. Census Bureau (1960–2025, retrieved 2026-02-08)
  4. Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-02-20)
  5. Wikidata (2026, retrieved 2026-02-08)

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