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

Updated on by Georank

The latest officially reported population of Japan was 123,366,734 in 2025 vs 5,315,065 people in Mauritania in 2025. In 2026, based on the adjusted UN estimation, the current Japan's population is 122,704,252 people compared to 5,539,189 in Mauritania.

Population statistics:

  • Japan's population is 22.2 times bigger than Mauritania's.
  • Japan is ranked the 12th most populous country in the world, while Mauritania is the 123rd.
  • The countries together account for 1.54% 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 -0.28% per year vs +2.98% in Mauritania.
  • Since 2006, the population of Japan has decreased from 128M people to 123M (4.03% decline), while Mauritania has grown from 3.01M to 5.54M (83.8% growth).

Japan vs Mauritania: population by year and forecast

Japan
Factual

Projection
Mauritania
Factual

Projection
1x
Year Population
Japan Mauritania
2100 76,995,942 17,302,938
2099 77,380,486 17,195,692
2098 77,759,557 17,083,078
2097 78,135,569 16,968,365
2096 78,515,892 16,850,394
2095 78,892,606 16,732,430
2094 79,267,768 16,610,512
2093 79,645,584 16,485,880
2092 80,025,578 16,359,440
2091 80,401,222 16,229,167
2090 80,778,500 16,097,149
2089 81,158,413 15,962,562
2088 81,539,639 15,824,899
2087 81,926,401 15,683,760
2086 82,322,612 15,541,281
2085 82,727,738 15,397,701
2084 83,141,354 15,251,533
2083 83,562,394 15,102,125
2082 83,998,809 14,952,194
2081 84,447,888 14,799,309
2080 84,918,455 14,645,548
2079 85,406,042 14,490,500
2078 85,916,840 14,331,284
2077 86,453,316 14,170,045
2076 87,012,155 14,007,555
2075 87,597,053 13,843,393
2074 88,209,803 13,678,579
2073 88,854,316 13,512,182
2072 89,519,055 13,343,946
2071 90,204,314 13,172,876
2070 90,919,143 13,002,521
2069 91,645,589 12,830,090
2068 92,388,299 12,657,711
2067 93,133,993 12,482,299
2066 93,889,902 12,306,495
2065 94,654,259 12,131,679
2064 95,412,429 11,954,090
2063 96,169,244 11,778,351
2062 96,924,236 11,601,323
2061 97,675,525 11,424,089
2060 98,422,553 11,246,850
2059 99,166,038 11,067,732
2058 99,890,950 10,887,645
2057 100,607,740 10,709,500
2056 101,318,164 10,532,648
2055 102,012,184 10,354,318
2054 102,706,063 10,175,517
2053 103,381,833 9,995,645
2052 104,059,800 9,815,104
2051 104,729,745 9,635,288
2050 105,400,477 9,457,400
2049 106,076,354 9,279,576
2048 106,754,699 9,100,595
2047 107,442,881 8,923,220
2046 108,139,155 8,745,286
2045 108,844,934 8,568,910
2044 109,553,441 8,393,773
2043 110,269,851 8,218,850
2042 110,992,599 8,044,865
2041 111,729,216 7,873,599
2040 112,463,507 7,703,561
2039 113,200,859 7,534,623
2038 113,940,856 7,366,187
2037 114,687,611 7,199,542
2036 115,436,359 7,033,866
2035 116,187,949 6,869,186
2034 116,936,734 6,705,635
2033 117,678,572 6,543,505
2032 118,419,247 6,383,229
2031 119,153,646 6,225,030
2030 119,882,512 6,068,395
2029 120,600,781 5,914,109
2028 121,314,239 5,761,715
2027 122,015,984 5,611,635
2026 122,704,252 5,462,675
2025 123,366,734 5,315,065
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 (2026–2100, retrieved 2026-07-08); World Bank | Health (1960–2025, retrieved 2026-07-08).

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 4,371,748 people (a 3.44% decline), while Mauritania's population increased by 1,452,532 people (a 35.5% growth).

Japan was ranked 10th most populous country in 2006 and is 12th in 2026. Mauritania was ranked 132nd in 2006 and ranked 123rd now.

The UN's World Population Prospects forecasts that in 24 years (in 2050) Japan's population will shrink by 14.1% to 105,400,477 people with a rank change from 12th to 17th. The population of Mauritania will increase by 70.7% to 9,457,400 people and rank change from 123rd to 103rd.

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 -0.49% 2.82%
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 (2026–2100, retrieved 2026-07-08); World Bank | Health (1961–2025, retrieved 2026-07-08).

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

In 2025, the population of Japan declined by 0.49%, while Mauritania's population grew by 2.82%.

Live population counters

Japan Mauritania
Current population
122704252
5539189
Population rank 12/197 123/197
Percent of world population 1.48% 0.07%
One net population change
52 seconds
3.62 minutes
One birth every
44.6 seconds
2.99 minutes
One death every
19.1 seconds
18.8 minutes
Daily growth/decline -1,667 +399
Annual growth/decline -608,637 +145,670
Annual growth/decline rate -0.49% +2.82%
Population growth rate rank 183/197 18/197
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 -942,213 153,357 147,927 -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 2026-07-08).

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

Over the last 10 years, 75% of the population change in Japan is from natural causes (a loss of 5,853,772 people) and 25% is from migration (a gain of 1,955,351 people). In Mauritania 99% is from natural causes (a gain of 1,350,038 people) and 1.04% is from migration (a loss of 14,187 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 (1960–2025, retrieved 2026-07-08); United Nations | World Population Prospects (1960–2026, retrieved 2026-07-08); U.S. Census Bureau (1960–2025, retrieved 2026-07-08); Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08).

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

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Data sources:

  1. World Bank | Health (1960–2025, retrieved 2026-07-08)
  2. United Nations | World Population Prospects (1960–2100, retrieved 2026-07-08)
  3. U.S. Census Bureau (1960–2025, retrieved 2026-07-08)
  4. Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08)
  5. Wikidata (2026, retrieved 2026-07-08)

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