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

Updated on by Georank

The latest officially reported population of Japan was 123,366,734 in 2025 vs 2,130,986 people in Slovenia in 2025. In 2026, based on the adjusted UN estimation, the current Japan's population is 122,704,252 people compared to 2,128,778 in Slovenia.

Population statistics:

  • Japan's population is 57.6 times bigger than Slovenia's.
  • Japan is ranked the 12th most populous country in the world, while Slovenia is the 147th.
  • The countries together account for 1.5% of the world: 1.48% for Japan vs 0.03% for Slovenia.
  • For the last 10 years, Japan has had an average growth rate of -0.28% per year vs +0.3% in Slovenia.
  • Since 2006, the population of Japan has decreased from 128M people to 123M (4.03% decline), while Slovenia has grown from 2.01M to 2.13M (6.07% growth).

Japan vs Slovenia: population by year and forecast

Japan
Factual

Projection
Slovenia
Factual

Projection
1x
Year Population
Japan Slovenia
2100 76,995,942 1,644,125
2099 77,380,486 1,648,345
2098 77,759,557 1,652,436
2097 78,135,569 1,656,808
2096 78,515,892 1,661,055
2095 78,892,606 1,665,286
2094 79,267,768 1,669,464
2093 79,645,584 1,673,724
2092 80,025,578 1,677,938
2091 80,401,222 1,682,129
2090 80,778,500 1,686,674
2089 81,158,413 1,691,063
2088 81,539,639 1,695,484
2087 81,926,401 1,700,115
2086 82,322,612 1,705,042
2085 82,727,738 1,709,916
2084 83,141,354 1,714,895
2083 83,562,394 1,720,145
2082 83,998,809 1,725,470
2081 84,447,888 1,731,075
2080 84,918,455 1,737,192
2079 85,406,042 1,743,318
2078 85,916,840 1,749,967
2077 86,453,316 1,756,612
2076 87,012,155 1,763,483
2075 87,597,053 1,770,727
2074 88,209,803 1,778,405
2073 88,854,316 1,786,591
2072 89,519,055 1,794,570
2071 90,204,314 1,802,890
2070 90,919,143 1,811,432
2069 91,645,589 1,820,576
2068 92,388,299 1,829,837
2067 93,133,993 1,838,874
2066 93,889,902 1,848,063
2065 94,654,259 1,857,701
2064 95,412,429 1,867,621
2063 96,169,244 1,877,265
2062 96,924,236 1,886,945
2061 97,675,525 1,896,873
2060 98,422,553 1,907,096
2059 99,166,038 1,917,040
2058 99,890,950 1,926,374
2057 100,607,740 1,936,340
2056 101,318,164 1,945,710
2055 102,012,184 1,955,123
2054 102,706,063 1,964,235
2053 103,381,833 1,972,942
2052 104,059,800 1,981,547
2051 104,729,745 1,989,616
2050 105,400,477 1,997,469
2049 106,076,354 2,004,847
2048 106,754,699 2,011,668
2047 107,442,881 2,018,540
2046 108,139,155 2,025,170
2045 108,844,934 2,031,795
2044 109,553,441 2,038,314
2043 110,269,851 2,044,630
2042 110,992,599 2,050,809
2041 111,729,216 2,056,524
2040 112,463,507 2,061,772
2039 113,200,859 2,067,224
2038 113,940,856 2,072,439
2037 114,687,611 2,078,235
2036 115,436,359 2,083,743
2035 116,187,949 2,089,024
2034 116,936,734 2,093,994
2033 117,678,572 2,099,177
2032 118,419,247 2,104,208
2031 119,153,646 2,109,288
2030 119,882,512 2,114,024
2029 120,600,781 2,118,491
2028 121,314,239 2,122,680
2027 122,015,984 2,125,958
2026 122,704,252 2,128,778
2025 123,366,734 2,130,986
2024 123,975,371 2,127,400
2023 124,516,650 2,120,461
2022 125,124,989 2,112,076
2021 125,681,593 2,108,079
2020 126,261,000 2,102,419
2019 126,633,000 2,088,385
2018 126,811,000 2,073,894
2017 126,972,000 2,066,388
2016 127,076,000 2,065,042
2015 127,141,000 2,063,531
2014 127,276,000 2,061,980
2013 127,445,000 2,059,953
2012 127,629,000 2,057,159
2011 127,833,000 2,052,843
2010 128,070,000 2,048,583
2009 128,047,000 2,039,669
2008 128,063,000 2,021,316
2007 128,001,000 2,018,122
2006 127,854,000 2,006,868
2005 127,773,000 2,000,474
2004 127,761,000 1,997,012
2003 127,718,000 1,995,733
2002 127,445,000 1,994,530
2001 127,149,000 1,992,060
2000 126,843,000 1,988,925
1999 126,631,000 1,983,045
1998 126,400,000 1,981,629
1997 126,057,000 1,985,956
1996 125,757,000 1,988,628
1995 125,472,000 1,989,872
1994 125,178,000 1,989,443
1993 124,829,000 1,991,746
1992 124,425,000 1,996,498
1991 123,964,000 1,999,429
1990 123,478,000 1,998,161
1989 123,069,000 1,996,351
1988 122,578,000 1,995,196
1987 122,069,000 1,989,776
1986 121,482,000 1,965,964
1985 120,837,000 1,941,641
1984 120,083,000 1,932,154
1983 119,307,000 1,922,321
1982 118,480,000 1,910,334
1981 117,661,000 1,906,531
1980 116,807,000 1,901,315
1979 115,890,000 1,882,599
1978 114,913,000 1,862,548
1977 113,872,000 1,842,377
1976 112,775,000 1,820,249
1975 111,573,000 1,793,581
1974 110,162,000 1,776,132
1973 108,707,000 1,766,697
1972 107,188,000 1,752,233
1971 105,697,000 1,738,335
1970 103,403,000 1,724,891
1969 102,219,000 1,713,874
1968 101,011,000 1,704,546
1967 99,879,000 1,689,528
1966 98,851,000 1,669,905
1965 97,952,000 1,649,160
1964 96,903,000 1,632,114
1963 95,900,000 1,616,971
1962 94,933,000 1,603,649
1961 94,055,000 1,594,131
1960 93,216,000 1,584,720

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/slovenia | CC BY

From 2006 to 2016, the population of Japan decreased by 778,000 people (a 0.61% decline), while Slovenia gained 58,174 people (a 2.9% growth).

For the next 10 years, from 2016 to 2026, Japan lost 4,371,748 people (a 3.44% decline), while Slovenia's population increased by 63,736 people (a 3.09% growth).

Japan was ranked 10th most populous country in 2006 and is 12th in 2026. Slovenia was ranked 141st in 2006 and ranked 147th 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 Slovenia will decrease by 6.17% to 1,997,469 people and will still be ranked 147th.

Both countries are in a period of decline and in 50 years are projected to lose 29.1% of the population in Japan and 17.2% in Slovenia.

Population growth rate by year

Japan
Factual

Projection
Slovenia
Factual

Projection
1x
Year Growth rate
Japan Slovenia
2100 -0.5% -0.26%
2099 -0.49% -0.25%
2098 -0.48% -0.26%
2097 -0.48% -0.26%
2096 -0.48% -0.25%
2095 -0.47% -0.25%
2094 -0.47% -0.25%
2093 -0.47% -0.25%
2092 -0.47% -0.25%
2091 -0.47% -0.27%
2090 -0.47% -0.26%
2089 -0.47% -0.26%
2088 -0.47% -0.27%
2087 -0.48% -0.29%
2086 -0.49% -0.29%
2085 -0.5% -0.29%
2084 -0.5% -0.31%
2083 -0.52% -0.31%
2082 -0.53% -0.32%
2081 -0.55% -0.35%
2080 -0.57% -0.35%
2079 -0.59% -0.38%
2078 -0.62% -0.38%
2077 -0.64% -0.39%
2076 -0.67% -0.41%
2075 -0.69% -0.43%
2074 -0.73% -0.46%
2073 -0.74% -0.44%
2072 -0.76% -0.46%
2071 -0.79% -0.47%
2070 -0.79% -0.5%
2069 -0.8% -0.51%
2068 -0.8% -0.49%
2067 -0.81% -0.5%
2066 -0.81% -0.52%
2065 -0.79% -0.53%
2064 -0.79% -0.51%
2063 -0.78% -0.51%
2062 -0.77% -0.52%
2061 -0.76% -0.54%
2060 -0.75% -0.52%
2059 -0.73% -0.48%
2058 -0.71% -0.51%
2057 -0.7% -0.48%
2056 -0.68% -0.48%
2055 -0.68% -0.46%
2054 -0.65% -0.44%
2053 -0.65% -0.43%
2052 -0.64% -0.41%
2051 -0.64% -0.39%
2050 -0.64% -0.37%
2049 -0.64% -0.34%
2048 -0.64% -0.34%
2047 -0.64% -0.33%
2046 -0.65% -0.33%
2045 -0.65% -0.32%
2044 -0.65% -0.31%
2043 -0.65% -0.3%
2042 -0.66% -0.28%
2041 -0.65% -0.25%
2040 -0.65% -0.26%
2039 -0.65% -0.25%
2038 -0.65% -0.28%
2037 -0.65% -0.26%
2036 -0.65% -0.25%
2035 -0.64% -0.24%
2034 -0.63% -0.25%
2033 -0.63% -0.24%
2032 -0.62% -0.24%
2031 -0.61% -0.22%
2030 -0.6% -0.21%
2029 -0.59% -0.2%
2028 -0.58% -0.15%
2027 -0.56% -0.13%
2026 -0.54% -0.1%
2025 -0.49% 0.17%
2024 -0.43% 0.33%
2023 -0.49% 0.4%
2022 -0.44% 0.19%
2021 -0.46% 0.27%
2020 -0.29% 0.67%
2019 -0.14% 0.7%
2018 -0.13% 0.36%
2017 -0.08% 0.07%
2016 -0.05% 0.07%
2015 -0.11% 0.08%
2014 -0.13% 0.1%
2013 -0.14% 0.14%
2012 -0.16% 0.21%
2011 -0.19% 0.21%
2010 0.02% 0.44%
2009 -0.01% 0.91%
2008 0.05% 0.16%
2007 0.11% 0.56%
2006 0.06% 0.32%
2005 0.009% 0.17%
2004 0.03% 0.06%
2003 0.21% 0.06%
2002 0.23% 0.12%
2001 0.24% 0.16%
2000 0.17% 0.3%
1999 0.18% 0.07%
1998 0.27% -0.22%
1997 0.24% -0.13%
1996 0.23% -0.06%
1995 0.23% 0.02%
1994 0.28% -0.12%
1993 0.32% -0.24%
1992 0.37% -0.15%
1991 0.39% 0.06%
1990 0.33% 0.09%
1989 0.4% 0.06%
1988 0.42% 0.27%
1987 0.48% 1.21%
1986 0.53% 1.25%
1985 0.63% 0.49%
1984 0.65% 0.51%
1983 0.7% 0.63%
1982 0.7% 0.2%
1981 0.73% 0.27%
1980 0.79% 0.99%
1979 0.85% 1.08%
1978 0.91% 1.09%
1977 0.97% 1.22%
1976 1.08% 1.49%
1975 1.28% 0.98%
1974 1.34% 0.53%
1973 1.42% 0.83%
1972 1.41% 0.8%
1971 2.22% 0.78%
1970 1.16% 0.64%
1969 1.2% 0.55%
1968 1.13% 0.89%
1967 1.04% 1.18%
1966 0.92% 1.26%
1965 1.08% 1.04%
1964 1.05% 0.94%
1963 1.02% 0.83%
1962 0.93% 0.6%
1961 0.9% 0.59%

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/slovenia | CC BY

In 2025, the population of Japan declined by 0.49%, while Slovenia's population grew by 0.17%.

Live population counters

Japan Slovenia
Current population
122704252
2128778
Population rank 12/197 147/197
Percent of world population 1.48% 0.03%
One net population change
52 seconds
2.45 hours
One birth every
44.6 seconds
31.3 minutes
One death every
19.1 seconds
24.5 minutes
Daily growth/decline -1,667 +10
Annual growth/decline -608,637 +3,586
Annual growth/decline rate -0.49% +0.17%
Population growth rate rank 183/197 153/197
One migration net change every
3.75 minutes
3.24 hours
Annual migration change +140,579 +2,711
Net migration rank 10/196 55/196
Foreign-born residents 3,409,529 315,122
Foreign-born residents rank 19/195 97/195
Foreign-born share of population 2.8% 14.9%
Foreign-born share rank 120/195 44/195

Natural population change vs migration

Japan
Natural

Migration
Slovenia
Natural

Migration
1x
Year Population change
Japan Slovenia
Natural Migration Natural Migration
2025 - 140,579 - 2,711
2024 -942,213 153,357 -4,680 3,319
2023 -871,617 175,003 -4,665 5,339
2022 -825,825 175,003 -4,858 9,014
2021 -640,976 -34,996 -4,216 2,477
2020 -542,923 42,001 -5,256 28,514
2019 -531,858 318,190 -1,254 16,352
2018 -456,520 320,601 -1,037 14,640
2017 -406,310 322,564 -207 1,359
2016 -343,106 314,732 826 1,195
2015 -292,424 168,896 826 712
2014 -267,279 58,109 2,268 -70
2013 -242,146 66,449 1,648 639
2012 -229,733 67,904 2,674 1,117
2011 -204,533 97,720 3,285 2,190
2010 -128,070 131,860 3,687 -410
2009 -76,828 125,450 3,060 11,594
2008 -51,225 142,605 3,437 2,971
2007 -25,600 138,024 1,211 14,191
2006 12,785 130,065 602 6,081
2005 -25,554 113,017 -600 6,317
2004 76,656 69,014 -599 1,759
2003 114,946 74,875 -1,996 3,218
2002 178,423 60,864 -1,197 1,975
2001 203,438 59,563 -996 4,527
2000 228,317 23,468 -398 3,124
1999 202,610 56,901 -1,388 10,291
1998 265,440 45,912 -1,189 -5,280
1997 277,325 43,366 -794 -1,298
1996 314,392 25,030 0 -2,456
1995 276,039 87,714 0 356
1994 363,017 154,214 199 -153
1993 312,073 168,836 -199 -4,641
1992 360,833 170,878 598 -5,547
1991 396,685 161,331 2,199 -3,325
1990 407,478 124,582 3,797 618
1989 467,662 31,202 4,592 -2,718
1988 527,085 51,154 5,986 -3,023
1987 598,138 28,001 5,771 2,972
1986 631,706 27,987 6,094 32,700
1985 676,687 -141,323 6,213 3,404
1984 756,523 -273,686 5,990 3,280
1983 775,495 -269,755 6,343 3,613
1982 805,664 -288,550 9,170 -8,695
1981 811,861 -278,525 10,485 -5,016
1980 864,372 -92,314 11,027 3,128
1979 950,298 -57,692 12,614 2,107
1978 1,011,234 -47,996 11,920 2,113
1977 1,070,397 -49,082 12,160 2,584
1976 1,127,750 -34,976 12,196 2,226
1975 1,204,989 107 11,658 2,421
1974 1,332,960 -10,145 11,367 3,145
1973 1,391,449 -34,674 11,837 2,175
1972 1,372,006 -73,980 10,513 2,924
1971 1,331,782 -107,778 10,951 2,286
1970 1,230,496 33,731 10,004 260
1969 1,195,962 49,447 9,427 685
1968 1,191,930 43,593 11,250 438
1967 1,258,475 29,632 13,516 -192
1966 682,072 68,934 15,697 -1,262
1965 1,126,448 -50,667 14,513 -1,421
1964 1,046,553 -100,696 12,567 -349
1963 987,770 -100,742 14,068 -180
1962 901,864 -57,075 13,150 148
1961 893,522 -58,882 14,985 -306
1960 894,874 -150,371 12,678 -929

Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).

GeoRank.org/population/japan/slovenia | 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 Slovenia 22.8% is from natural causes (a loss of 24,521 people) and 77.2% is from migration (a gain of 82,921 people).

As of 2024, 3,409,529 residents or 2.8% of the population were not native-born in Japan, compared to 315,122 people or 14.9% in Slovenia.

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
Slovenia
City Population
Ljubljana 284K
Maribor 114K
Kranj 37.6K
Celje 37.1K
Velenje 25.6K
Novo Mesto 24.2K
Nova Gorica 13K
Izola 11.7K
Murska Sobota 11.2K
Piran 3.79K

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/slovenia | 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. Wikidata (2026, retrieved 2026-07-08)
  5. Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08)

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