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

Updated on by Georank

The latest officially reported population of Japan was 123,366,734 in 2025 vs 19,020,271 people in Romania in 2025. In 2026, based on the adjusted UN estimation, the current Japan's population is 122,704,252 people compared to 18,912,567 in Romania.

Population statistics:

  • Japan's population is 6.49 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 1.7% 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 -0.28% per year vs -0.41% in Romania.
  • Since 2006, the population of Japan has decreased from 128M people to 123M (4.03% decline), while Romania has declined from 21.2M to 18.9M (10.8% decline).

Japan vs Romania: population by year and forecast

Japan
Factual

Projection
Romania
Factual

Projection
1x
Year Population
Japan Romania
2100 76,995,942 10,843,503
2099 77,380,486 10,927,951
2098 77,759,557 11,011,822
2097 78,135,569 11,095,182
2096 78,515,892 11,178,195
2095 78,892,606 11,261,202
2094 79,267,768 11,343,358
2093 79,645,584 11,426,736
2092 80,025,578 11,509,522
2091 80,401,222 11,591,897
2090 80,778,500 11,675,686
2089 81,158,413 11,759,143
2088 81,539,639 11,842,733
2087 81,926,401 11,926,699
2086 82,322,612 12,013,212
2085 82,727,738 12,099,742
2084 83,141,354 12,187,794
2083 83,562,394 12,277,402
2082 83,998,809 12,367,518
2081 84,447,888 12,460,785
2080 84,918,455 12,556,104
2079 85,406,042 12,652,446
2078 85,916,840 12,750,395
2077 86,453,316 12,849,896
2076 87,012,155 12,950,914
2075 87,597,053 13,053,551
2074 88,209,803 13,158,624
2073 88,854,316 13,264,931
2072 89,519,055 13,375,162
2071 90,204,314 13,488,051
2070 90,919,143 13,603,287
2069 91,645,589 13,721,187
2068 92,388,299 13,840,530
2067 93,133,993 13,963,377
2066 93,889,902 14,088,938
2065 94,654,259 14,218,608
2064 95,412,429 14,349,029
2063 96,169,244 14,480,312
2062 96,924,236 14,613,788
2061 97,675,525 14,747,178
2060 98,422,553 14,879,235
2059 99,166,038 15,011,161
2058 99,890,950 15,141,670
2057 100,607,740 15,271,230
2056 101,318,164 15,400,030
2055 102,012,184 15,527,331
2054 102,706,063 15,651,338
2053 103,381,833 15,773,422
2052 104,059,800 15,896,118
2051 104,729,745 16,016,719
2050 105,400,477 16,135,745
2049 106,076,354 16,255,638
2048 106,754,699 16,375,139
2047 107,442,881 16,494,633
2046 108,139,155 16,612,186
2045 108,844,934 16,730,009
2044 109,553,441 16,848,827
2043 110,269,851 16,966,857
2042 110,992,599 17,084,359
2041 111,729,216 17,203,640
2040 112,463,507 17,320,952
2039 113,200,859 17,438,042
2038 113,940,856 17,556,386
2037 114,687,611 17,673,500
2036 115,436,359 17,790,613
2035 116,187,949 17,906,949
2034 116,936,734 18,020,973
2033 117,678,572 18,134,889
2032 118,419,247 18,247,275
2031 119,153,646 18,359,750
2030 119,882,512 18,471,446
2029 120,600,781 18,583,513
2028 121,314,239 18,693,807
2027 122,015,984 18,803,518
2026 122,704,252 18,912,567
2025 123,366,734 19,020,271
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 (2026–2100, retrieved 2026-07-08); World Bank | Health (1960–2025, retrieved 2026-07-08).

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 4,371,748 people (a 3.44% decline), while Romania's population decreased by 789,700 people (a 4.01% 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 105,400,477 people with a rank change from 12th to 17th. The population of Romania will decrease by 14.7% to 16,135,745 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 -0.49% -0.17%
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 (2026–2100, retrieved 2026-07-08); World Bank | Health (1961–2025, retrieved 2026-07-08).

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

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

Live population counters

Japan Romania
Current population
122704252
18912567
Population rank 12/197 70/197
Percent of world population 1.48% 0.23%
One net population change
52 seconds
16.7 minutes
One birth every
44.6 seconds
3.68 minutes
One death every
19.1 seconds
2.16 minutes
Daily growth/decline -1,667 -86
Annual growth/decline -608,637 -31,533
Annual growth/decline rate -0.49% -0.17%
Population growth rate rank 183/197 172/197
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 -942,213 153,357 -100,975 -28,466
2023 -871,617 175,003 -83,869 -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 2026-07-08).

GeoRank.org/population/japan/romania | 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 Romania 83.4% is from natural causes (a loss of 805,807 people) and 16.6% is from migration (a loss of 160,935 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 (1960–2025, 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/romania | 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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