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

Updated on by Georank team

The latest officially reported population of Japan was 123,975,371 in 2024 vs 19,051,804 people in Romania in 2024. In 2026, based on the adjusted UN estimation, the current Japan's population is 122,677,250 people compared to 18,839,108 in Romania.

Population statistics:

  • Japan's population is 6.51 times bigger than Romania's.
  • Japan is ranked the 12th most populous country in the world, while Romania is the 70th.
  • The countries together account for 1.71% of the world: 1.48% for Japan vs 0.23% for Romania.
  • For the last 10 years, Japan has had an average growth rate of -0.25% per year vs -0.43% in Romania.
  • Since 2006, the population of Japan has decreased from 128M people to 123M (4.05% decline), while Romania has declined from 21.2M to 18.8M (11.1% decline).

Japan vs Romania: population by year and forecast

Japan
Factual

Projection
Romania
Factual

Projection
1x
Year Population
Japan Romania
2100 76,978,998 10,801,385
2099 77,363,458 10,885,505
2098 77,742,445 10,969,050
2097 78,118,375 11,052,086
2096 78,498,614 11,134,776
2095 78,875,245 11,217,462
2094 79,250,325 11,299,298
2093 79,628,057 11,382,352
2092 80,007,967 11,464,817
2091 80,383,529 11,546,872
2090 80,760,724 11,630,335
2089 81,140,553 11,713,468
2088 81,521,696 11,796,733
2087 81,908,373 11,880,373
2086 82,304,497 11,966,550
2085 82,709,534 12,052,744
2084 83,123,058 12,140,454
2083 83,544,006 12,229,714
2082 83,980,325 12,319,480
2081 84,429,305 12,412,385
2080 84,899,768 12,507,333
2079 85,387,247 12,603,302
2078 85,897,934 12,700,870
2077 86,434,291 12,799,985
2076 86,993,007 12,900,610
2075 87,577,777 13,002,848
2074 88,190,392 13,107,513
2073 88,834,763 13,213,407
2072 89,499,356 13,323,211
2071 90,184,464 13,435,661
2070 90,899,136 13,550,449
2069 91,625,421 13,667,892
2068 92,367,969 13,786,771
2067 93,113,499 13,909,141
2066 93,869,240 14,034,214
2065 94,633,430 14,163,381
2064 95,391,433 14,293,294
2063 96,148,081 14,424,068
2062 96,902,907 14,557,025
2061 97,654,031 14,689,897
2060 98,400,894 14,821,441
2059 99,144,216 14,952,855
2058 99,868,968 15,082,857
2057 100,585,601 15,211,914
2056 101,295,868 15,340,213
2055 101,989,736 15,467,019
2054 102,683,462 15,590,545
2053 103,359,083 15,712,155
2052 104,036,901 15,834,374
2051 104,706,698 15,954,507
2050 105,377,283 16,073,070
2049 106,053,011 16,192,498
2048 106,731,207 16,311,535
2047 107,419,237 16,430,565
2046 108,115,358 16,547,661
2045 108,820,982 16,665,026
2044 109,529,333 16,783,383
2043 110,245,586 16,900,955
2042 110,968,174 17,018,000
2041 111,704,629 17,136,818
2040 112,438,759 17,253,674
2039 113,175,948 17,370,310
2038 113,915,783 17,488,193
2037 114,662,374 17,604,853
2036 115,410,956 17,721,511
2035 116,162,381 17,837,396
2034 116,911,001 17,950,976
2033 117,652,676 18,064,449
2032 118,393,188 18,176,399
2031 119,127,425 18,288,437
2030 119,856,131 18,399,699
2029 120,574,242 18,511,331
2028 121,287,543 18,621,197
2027 121,989,133 18,730,482
2026 122,677,250 18,839,108
2025 123,339,586 18,946,392
2024 123,975,371 19,051,804
2023 124,516,650 19,061,062
2022 125,124,989 19,048,502
2021 125,681,593 19,122,059
2020 126,261,000 19,265,250
2019 126,633,000 19,371,648
2018 126,811,000 19,473,970
2017 126,972,000 19,588,715
2016 127,076,000 19,702,267
2015 127,141,000 19,815,616
2014 127,276,000 19,908,979
2013 127,445,000 19,983,693
2012 127,629,000 20,058,035
2011 127,833,000 20,147,528
2010 128,070,000 20,246,871
2009 128,047,000 20,367,487
2008 128,063,000 20,537,875
2007 128,001,000 20,882,982
2006 127,854,000 21,193,760
2005 127,773,000 21,319,685
2004 127,761,000 21,451,748
2003 127,718,000 21,574,326
2002 127,445,000 21,730,496
2001 127,149,000 22,131,970
2000 126,843,000 22,442,971
1999 126,631,000 22,472,040
1998 126,400,000 22,507,344
1997 126,057,000 22,553,978
1996 125,757,000 22,619,004
1995 125,472,000 22,684,270
1994 125,178,000 22,730,211
1993 124,829,000 22,763,280
1992 124,425,000 22,794,284
1991 123,964,000 23,001,155
1990 123,478,000 23,201,835
1989 123,069,000 23,161,458
1988 122,578,000 23,057,662
1987 122,069,000 22,949,430
1986 121,482,000 22,836,841
1985 120,837,000 22,732,999
1984 120,083,000 22,640,547
1983 119,307,000 22,560,478
1982 118,480,000 22,475,741
1981 117,661,000 22,353,070
1980 116,807,000 22,207,282
1979 115,890,000 22,090,488
1978 114,913,000 21,951,464
1977 113,872,000 21,756,096
1976 112,775,000 21,551,634
1975 111,573,000 21,293,583
1974 110,162,000 21,029,429
1973 108,707,000 20,835,681
1972 107,188,000 20,657,957
1971 105,697,000 20,461,567
1970 103,403,000 20,250,398
1969 102,219,000 20,009,141
1968 101,011,000 19,799,831
1967 99,879,000 19,534,242
1966 98,851,000 19,215,450
1965 97,952,000 19,031,576
1964 96,903,000 18,919,126
1963 95,900,000 18,797,850
1962 94,933,000 18,676,550
1961 94,055,000 18,555,250
1960 93,216,000 18,406,905

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/romania | CC BY

From 2006 to 2016, the population of Japan decreased by 778,000 people (a 0.61% decline), while Romania lost 1,491,493 people (a 7.04% decline).

For the next 10 years, from 2016 to 2026, Japan lost 4,398,750 people (a 3.46% decline), while Romania's population decreased by 863,159 people (a 4.38% decline).

Japan was ranked 10th most populous country in 2006 and is 12th in 2026. Romania was ranked 51st in 2006 and ranked 70th 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 Romania will decrease by 14.7% to 16,073,070 people and rank change from 70th to 81st.

Both countries are in a period of decline and in 50 years are projected to lose 29.1% of the population in Japan and 31.5% in Romania.

Population growth rate by year

Japan
Factual

Projection
Romania
Factual

Projection
1x
Year Growth rate
Japan Romania
2100 -0.5% -0.77%
2099 -0.49% -0.76%
2098 -0.48% -0.75%
2097 -0.48% -0.74%
2096 -0.48% -0.74%
2095 -0.47% -0.72%
2094 -0.47% -0.73%
2093 -0.47% -0.72%
2092 -0.47% -0.71%
2091 -0.47% -0.72%
2090 -0.47% -0.71%
2089 -0.47% -0.71%
2088 -0.47% -0.7%
2087 -0.48% -0.72%
2086 -0.49% -0.72%
2085 -0.5% -0.72%
2084 -0.5% -0.73%
2083 -0.52% -0.73%
2082 -0.53% -0.75%
2081 -0.55% -0.76%
2080 -0.57% -0.76%
2079 -0.59% -0.77%
2078 -0.62% -0.77%
2077 -0.64% -0.78%
2076 -0.67% -0.79%
2075 -0.69% -0.8%
2074 -0.73% -0.8%
2073 -0.74% -0.82%
2072 -0.76% -0.84%
2071 -0.79% -0.85%
2070 -0.79% -0.86%
2069 -0.8% -0.86%
2068 -0.8% -0.88%
2067 -0.81% -0.89%
2066 -0.81% -0.91%
2065 -0.79% -0.91%
2064 -0.79% -0.91%
2063 -0.78% -0.91%
2062 -0.77% -0.9%
2061 -0.76% -0.89%
2060 -0.75% -0.88%
2059 -0.73% -0.86%
2058 -0.71% -0.85%
2057 -0.7% -0.84%
2056 -0.68% -0.82%
2055 -0.68% -0.79%
2054 -0.65% -0.77%
2053 -0.65% -0.77%
2052 -0.64% -0.75%
2051 -0.64% -0.74%
2050 -0.64% -0.74%
2049 -0.64% -0.73%
2048 -0.64% -0.72%
2047 -0.64% -0.71%
2046 -0.65% -0.7%
2045 -0.65% -0.71%
2044 -0.65% -0.7%
2043 -0.65% -0.69%
2042 -0.66% -0.69%
2041 -0.65% -0.68%
2040 -0.65% -0.67%
2039 -0.65% -0.67%
2038 -0.65% -0.66%
2037 -0.65% -0.66%
2036 -0.65% -0.65%
2035 -0.64% -0.63%
2034 -0.63% -0.63%
2033 -0.63% -0.62%
2032 -0.62% -0.61%
2031 -0.61% -0.6%
2030 -0.6% -0.6%
2029 -0.59% -0.59%
2028 -0.58% -0.58%
2027 -0.56% -0.58%
2026 -0.54% -0.57%
2025 -0.51% -0.55%
2024 -0.43% -0.05%
2023 -0.49% 0.07%
2022 -0.44% -0.38%
2021 -0.46% -0.74%
2020 -0.29% -0.55%
2019 -0.14% -0.53%
2018 -0.13% -0.59%
2017 -0.08% -0.58%
2016 -0.05% -0.57%
2015 -0.11% -0.47%
2014 -0.13% -0.37%
2013 -0.14% -0.37%
2012 -0.16% -0.44%
2011 -0.19% -0.49%
2010 0.02% -0.59%
2009 -0.01% -0.83%
2008 0.05% -1.65%
2007 0.11% -1.47%
2006 0.06% -0.59%
2005 0.009% -0.62%
2004 0.03% -0.57%
2003 0.21% -0.72%
2002 0.23% -1.81%
2001 0.24% -1.39%
2000 0.17% -0.13%
1999 0.18% -0.16%
1998 0.27% -0.21%
1997 0.24% -0.29%
1996 0.23% -0.29%
1995 0.23% -0.2%
1994 0.28% -0.15%
1993 0.32% -0.14%
1992 0.37% -0.9%
1991 0.39% -0.86%
1990 0.33% 0.17%
1989 0.4% 0.45%
1988 0.42% 0.47%
1987 0.48% 0.49%
1986 0.53% 0.46%
1985 0.63% 0.41%
1984 0.65% 0.35%
1983 0.7% 0.38%
1982 0.7% 0.55%
1981 0.73% 0.66%
1980 0.79% 0.53%
1979 0.85% 0.63%
1978 0.91% 0.9%
1977 0.97% 0.95%
1976 1.08% 1.21%
1975 1.28% 1.26%
1974 1.34% 0.93%
1973 1.42% 0.86%
1972 1.41% 0.96%
1971 2.22% 1.04%
1970 1.16% 1.21%
1969 1.2% 1.06%
1968 1.13% 1.36%
1967 1.04% 1.66%
1966 0.92% 0.97%
1965 1.08% 0.59%
1964 1.05% 0.65%
1963 1.02% 0.65%
1962 0.93% 0.65%
1961 0.9% 0.81%

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/romania | CC BY

In 2024, the population of Japan declined by 0.43%, while Romania's population declined by 0.05%.

Live population counters

Japan Romania
Current population
122677250
18839108
Population rank 12/197 70/197
Percent of world population 1.48% 0.23%
One net population change
58.3 seconds
56.8 minutes
One birth every
42.2 seconds
3.45 minutes
One death every
19.5 seconds
2.17 minutes
Daily growth/decline -1,483 -25
Annual growth/decline -541,279 -9,258
Annual growth/decline rate -0.43% -0.05%
Population growth rate rank 185/197 169/197
One migration net change every
3.75 minutes
18.1 minutes
Annual migration change +140,579 -29,041
Net migration rank 10/196 163/196
Foreign-born residents 3,409,529 655,579
Foreign-born residents rank 19/195 73/195
Foreign-born share of population 2.8% 3.4%
Foreign-born share rank 120/195 112/195

Natural population change vs migration

Japan
Natural

Migration
Romania
Natural

Migration
1x
Year Population change
Japan Romania
Natural Migration Natural Migration
2025 - 140,579 - -29,041
2024 - 153,357 - -28,466
2023 -871,617 175,003 -89,587 -27,780
2022 -825,825 175,003 -93,338 89,076
2021 -640,976 -34,996 -141,504 -17,731
2020 -542,923 42,001 -100,179 -13,202
2019 -531,858 318,190 -60,053 -27,909
2018 -456,520 320,601 -62,316 -33,018
2017 -406,310 322,564 -50,930 -33,081
2016 -343,106 314,732 -53,196 -33,073
2015 -292,424 168,896 -59,447 -35,751
2014 -267,279 58,109 -55,745 -35,448
2013 -242,146 66,449 -59,951 -34,910
2012 -229,733 67,904 -54,157 -37,589
2011 -204,533 97,720 -56,413 -102,769
2010 -128,070 131,860 -46,567 -122,364
2009 -76,828 125,450 -34,625 -137,953
2008 -51,225 142,605 -30,806 -144,368
2007 -25,600 138,024 -37,590 -133,089
2006 12,785 130,065 -38,148 -132,777
2005 -25,554 113,017 -40,508 -131,176
2004 76,656 69,014 -42,904 -117,432
2003 114,946 74,875 -56,093 -107,139
2002 178,423 60,864 -58,673 -106,585
2001 203,438 59,563 -37,625 -91,154
2000 228,317 23,468 -22,443 -92,451
1999 202,610 56,901 -31,461 -82,590
1998 265,440 45,912 -33,761 -81,366
1997 277,325 43,366 -42,853 -88,734
1996 314,392 25,030 -56,548 -70,799
1995 276,039 87,714 -36,295 -73,779
1994 363,017 154,214 -18,184 -76,246
1993 312,073 168,836 -13,658 -73,475
1992 360,833 170,878 -4,559 -63,200
1991 396,685 161,331 25,301 -36,824
1990 407,478 124,582 69,605 -38,157
1989 467,662 31,202 122,756 -33,866
1988 527,085 51,154 126,817 -48,911
1987 598,138 28,001 128,517 -42,868
1986 631,706 27,987 134,737 -50,450
1985 676,687 -141,323 111,392 -28,108
1984 756,523 -273,686 117,731 -24,629
1983 775,495 -269,755 87,986 3,093
1982 805,664 -288,550 119,121 -4,725
1981 811,861 -278,525 156,472 -20,870
1980 864,372 -92,314 168,776 -16,668
1979 950,298 -57,692 194,397 -29,600
1978 1,011,234 -47,996 204,148 -31,427
1977 1,070,397 -49,082 215,385 -28,135
1976 1,127,750 -34,976 213,361 18,748
1975 1,204,989 107 219,324 9,125
1974 1,332,960 -10,145 235,530 6,725
1973 1,391,449 -34,674 175,020 58,651
1972 1,372,006 -73,980 198,316 61,920
1971 1,331,782 -107,778 206,662 74,473
1970 1,230,496 33,731 234,905 71,919
1969 1,195,962 49,447 264,120 74,851
1968 1,191,930 43,593 338,577 33,601
1967 1,258,475 29,632 347,709 37,282
1966 682,072 68,934 115,293 -25,458
1965 1,126,448 -50,667 114,190 -60,430
1964 1,046,553 -100,696 134,326 -59,500
1963 987,770 -100,742 139,104 -58,076
1962 901,864 -57,075 130,736 -56,152
1961 893,522 -58,882 163,286 -54,642
1960 894,874 -150,371 191,431 -55,397

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

GeoRank.org/population/japan/romania | 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 Romania 82% is from natural causes (a loss of 766,295 people) and 18% is from migration (a loss of 167,917 people).

As of 2024, 3,409,529 residents or 2.8% of the population were not native-born in Japan, compared to 655,579 people or 3.4% in Romania.

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
Romania
City Population
Bucharest 1.72M
Cluj-Napoca 287K
Iasi 272K
Constanta 264K
Timisoara 251K
Brasov 238K
Craiova 234K
Galati 218K
Oradea 183K
Ploiesti 181K

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/romania | 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. Wikidata (2026, retrieved 2026-02-08)
  5. Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-02-20)

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