The statistic shows the total population in Japan from 2020 to 2024, with projections up until 2030. In 2024, the total population of Japan amounted to around 123.89 million inhabitants. See the figures for the population of South Korea for comparison. Total population in Japan From steadily low fertility rates to a growing elderly population, it is no secret that Japan’s population is shrinking. Population growth rates jump around a little, but are currently following a declining trend. The post-war baby boom generation is now in the 65-and-over age group, and the percentage of the population in that category is expected to keep growing, as is indicated by a high median age and high life expectancy. Japan already has the highest percentage of its population over 65 in the world, and the aging population puts some pressure on the Japanese government to provide welfare services for more people as rising numbers leave the workforce. However, the amount of jobs opened up for the younger generations by the older generations leaving the workforce means that unemployment is kept to a minimum. Despite a jump in unemployment after the global recession hit in 2008, rates were almost back to pre-recession rates by 2013. Another factor affecting Japan is the number of emigrants to other countries. The United States absorbs a number of emigrants worldwide, so despite a stagnating birth rate, the U.S. has seen a steady rise in population.

Historical chart and dataset showing Japan population growth rate by year from 1961 to 2023.

In 2023, the annual population growth in Japan stood at -0.49 percent. Between 1961 and 2023, the figure dropped by 1.39 percentage points, though the decline followed an uneven course rather than a steady trajectory.

Graph and download economic data for Population Growth for Japan (SPPOPGROWJPN) from 1961 to 2024 about Japan, population, and rate.

As of 2024, the total population in Japan was estimated to be approximately ********************. The projection for 2100 indicated an almost ** percent decrease in population to around **** million people.

Japan IPSS: Population: Projection: High Mortality: Low Birth Rate data was reported at 80,461.179 Person th in 2065. This records a decrease from the previous number of 81,572.000 Person th for 2064. Japan IPSS: Population: Projection: High Mortality: Low Birth Rate data is updated yearly, averaging 106,945.285 Person th from Dec 2015 (Median) to 2065, with 51 observations. The data reached an all-time high of 127,094.745 Person th in 2015 and a record low of 80,461.179 Person th in 2065. Japan IPSS: Population: Projection: High Mortality: Low Birth Rate data remains active status in CEIC and is reported by National Institute of Population and Social Security Research. The data is categorized under Global Database’s Japan – Table JP.G004: Population: Projection: National Institute of Population and Social Security Research.

In 2023, there were around *** live births per 1,000 inhabitants in Japan, down from about *** in the previous year. The total number of live births in the nation amounted to approximately ******* in 2023. Japan’s super aging society Directly after the end of WWII, the live birth rate in Japan was over ** per 1,000 of population. The rate has constantly dropped in the last decades after the second baby boom (between 1971 and 1974). Meanwhile, the life expectancy of the Japanese people has increased, reaching about **** years for women and **** years for men in 2022. Due to the combination of both factors, Japan has developed into one of the most rapidly aging societies in the world. Almost ** percent of Japan’s population is currently aged 65 years and older, falling into the “super-aged nation” defined by international institutions and organizations.  Decreasing number of marriages In Japan, the number of births outside of marriage is small. The Japanese government, therefore, considers the decreasing number of marriages as the driving factor behind the country’s fertility decline. As of 2023, the number of marriages per 1,000 Japanese citizens was ***, less than half compared to that in the early *****. The average age of first marriage has also risen for both men and women. This trend can be partially attributed to the increasing number of employed and therefore financially and socially independent women in the past two decades. The employment rate of women in Japan exceeded ** percent for the first time in history in ****.

Graph and download economic data for Population, Total for Japan (POPTOTJPA647NWDB) from 1960 to 2024 about Japan and population.

In 1800, the population of Japan was just over 30 million, a figure which would grow by just two million in the first half of the 19th century. However, with the fall of the Tokugawa shogunate and the restoration of the emperor in the Meiji Restoration of 1868, Japan would begin transforming from an isolated feudal island, to a modernized empire built on Western models. The Meiji period would see a rapid rise in the population of Japan, as industrialization and advancements in healthcare lead to a significant reduction in child mortality rates, while the creation overseas colonies would lead to a strong economic boom. However, this growth would slow beginning in 1937, as Japan entered a prolonged war with the Republic of China, which later grew into a major theater of the Second World War. The war was eventually brought to Japan's home front, with the escalation of Allied air raids on Japanese urban centers from 1944 onwards (Tokyo was the most-bombed city of the Second World War). By the war's end in 1945 and the subsequent occupation of the island by the Allied military, Japan had suffered over two and a half million military fatalities, and over one million civilian deaths.

The population figures of Japan were quick to recover, as the post-war “economic miracle” would see an unprecedented expansion of the Japanese economy, and would lead to the country becoming one of the first fully industrialized nations in East Asia. As living standards rose, the population of Japan would increase from 77 million in 1945, to over 127 million by the end of the century. However, growth would begin to slow in the late 1980s, as birth rates and migration rates fell, and Japan eventually grew to have one of the oldest populations in the world. The population would peak in 2008 at just over 128 million, but has consistently fallen each year since then, as the fertility rate of the country remains below replacement level (despite government initiatives to counter this) and the country's immigrant population remains relatively stable. The population of Japan is expected to continue its decline in the coming years, and in 2020, it is estimated that approximately 126 million people inhabit the island country.

Japan Population: Aichi-ken: 0 to 4 Years data was reported at 323.000 Person th in 2017. This records a decrease from the previous number of 327.000 Person th for 2016. Japan Population: Aichi-ken: 0 to 4 Years data is updated yearly, averaging 351.500 Person th from Dec 1996 (Median) to 2017, with 22 observations. The data reached an all-time high of 370.000 Person th in 2002 and a record low of 323.000 Person th in 2017. Japan Population: Aichi-ken: 0 to 4 Years data remains active status in CEIC and is reported by Statistical Bureau. The data is categorized under Global Database’s Japan – Table JP.G003: Population: Annual: By Prefecture.

Graph and download economic data for Infra-Annual Labor Statistics: Working-Age Population Total: From 15 to 64 Years for Japan (LFWA64TTJPM647S) from Jan 1970 to Jun 2025 about working-age, 15 to 64 years, Japan, and population.

PERIOD: 1920-1939. NOTE: (As of October 1st but as of September 1st in 1923)The population estimates were obtained as follows: (1) For 1921 to 1923, the population estimate is the sum of county- and city-level population estimates obtained by multiplying the de facto population in the Population Census conducted on October 1, 1920, with the average annual population growth rate by gender from 1908 to 1918. (2) For 1924, the difference between the population of Japan overall calculated using the population growth rate by sex in each city and summing up the results and the population overall calculated using the population growth rate by sex for Japan overall was proportionally subtracted from the population of each prefecture; moreover, the population decrease due to the Great Kanto Earthquake on September 1, 1923 was also taken into account. (3) For Taisho 1926 to 1929, the de facto population in the 1920 and 1925 Population Censuses is used to obtain the annual average geometric growth rate of Japan's population overall, which is then used to estimate the population. (4) For 1931 to 1934, the same procedure is employed using the de facto population in the 1920 and 1930 Population Censuses. (5) From 1926 onward, the population estimates are obtained by adding the increase in the difference between births and deaths up to each estimation year in the 1935 Population Census using the results of the Vital Statistics survey. SOURCE: [Survey by the Statistics Bureau, Imperial Cabinet].

Population aged 0-14 years of Japan decreased by 1.83% from 11.6 % in 2023 to 11.4 % in 2024. Since the 0.91% decline in 2014, population aged 0-14 years slumped by 11.83% in 2024. Population between the ages 0 to 14 as a percentage of the total population. Population is based on the de facto definition of population.

Approximately **** million people in Japan were estimated to be within the age group 65 and over in 2024. This number was projected to ******** until 2040 and then ******* to about **** million by 2120.

Japan Population Census: Age 20 to 24 Years data was reported at 5,968,127.000 Person in 2015. This records a decrease from the previous number of 6,426,433.000 Person for 2010. Japan Population Census: Age 20 to 24 Years data is updated yearly, averaging 7,822,781.000 Person from Dec 1920 (Median) to 2015, with 20 observations. The data reached an all-time high of 10,727,636.000 Person in 1970 and a record low of 4,609,310.000 Person in 1920. Japan Population Census: Age 20 to 24 Years data remains active status in CEIC and is reported by Statistical Bureau. The data is categorized under Global Database’s Japan – Table JP.G002: Population: Annual.

In 2023, the total population in Japan slightly decreased to just below *** million people compared to the previous year, with the female population reaching around **** million, as compared to **** million men. The oldest population in the world  Japanese society is facing severe demographic problems such as decreasing birthrates, remaining under *** million births annually recently, and a thereby aging population. The country’s average age lies at around ** years, making its population the oldest in the world. Elderly people aged 65 years and older accounted for about ** percent of the population in 2023. According to a forecast, this age group would make up approximately ** percent of the Japanese population by 2070. Challenges with the demographic shift The rapid aging of the society poses significant economic and sociopolitical challenges to the country, as the workforce will continue to shrink while increasingly more elderly will receive long-term support. Currently, close to ***** million Japanese require long-term care, leading to national benefit expenses of over ** trillion yen annually, including in-home and community-based services.

Japan JP: Rural Population: % of Total Population data was reported at 8.465 % in 2017. This records a decrease from the previous number of 8.543 % for 2016. Japan JP: Rural Population: % of Total Population data is updated yearly, averaging 22.849 % from Dec 1960 (Median) to 2017, with 58 observations. The data reached an all-time high of 36.728 % in 1960 and a record low of 8.465 % in 2017. Japan JP: Rural Population: % of Total Population data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Japan – Table JP.World Bank.WDI: Population and Urbanization Statistics. Rural population refers to people living in rural areas as defined by national statistical offices. It is calculated as the difference between total population and urban population.; ; World Bank staff estimates based on the United Nations Population Division's World Urbanization Prospects: 2018 Revision.; Weighted average;

BackgroundKawasaki disease (KD) is a common cause of acquired paediatric heart disease in developed countries. KD was first identified in the 1960s in Japan, and has been steadily increasing since it was first reported. The aetiology of KD has not been defined, but is assumed to be infection-related. The present study sought to identify the factor(s) that mediate the geographical variation and chronological increase of KD in Japan.Methods and FindingsBased upon data reported between 1979 and 2010 from all 47 prefectures in Japan, the incidence and mean patient age at the onset of KD were estimated. Using spatial and time-series analyses, incidence and mean age were regressed against climatic/socioeconomic variables. Both incidence and mean age of KD were inversely correlated with the total fertility rate (TFR; i.e., the number of children that would be born to one woman). The extrapolation of a time-series regressive model suggested that KD emerged in the 1960s because of a dramatic decrease in TFR in the 1940s through the 1950s.ConclusionsMean patient age is an inverse surrogate for the hazard of contracting the aetiologic agent. Therefore, the observed negative correlation between mean patient age and TFR suggests that a higher TFR is associated with KD transmission. This relationship may be because a higher TFR facilitates sibling-to-sibling transmission. Additionally, the observed inverse correlation between incidence and TFR implies a paradoxical “negative” correlation between the incidence and the hazard of contracting the aetiologic agent. It was hypothesized that a decreasing TFR resulted in a reduced hazard of contracting the agent for KD, thereby increasing KD incidence.

Japan Population Census: Age 15 to 19 Years data was reported at 6,008,388.000 Person in 2015. This records a decrease from the previous number of 6,063,357.000 Person for 2010. Japan Population Census: Age 15 to 19 Years data is updated yearly, averaging 7,884,538.000 Person from Dec 1920 (Median) to 2015, with 20 observations. The data reached an all-time high of 10,947,996.000 Person in 1965 and a record low of 5,419,057.000 Person in 1920. Japan Population Census: Age 15 to 19 Years data remains active status in CEIC and is reported by Statistical Bureau. The data is categorized under Global Database’s Japan – Table JP.G002: Population: Annual.

Over the last decade, Japan’s population has aged more and more, to the point where more than a quarter of Japanese were 65 years and older in 2022. Population growth has stopped and even reversed, since it’s been in the red for several years now.

It’s getting old

With almost 30 percent of its population being elderly inhabitants, Japan is considered the “oldest” country in the world today. Japan boasts a high life expectancy, in fact, the Japanese tend to live longer than the average human worldwide. The increase of the aging population is accompanied by a decrease of the total population caused by a sinking birth rate. Japan’s fertility rate has been below the replacement rate for many decades now, mostly due to economic uncertainty and thus a decreasing number of marriages.

Are the Japanese invincible?

There is no real mystery surrounding the ripe old age of so many Japanese. Their high average age is very likely due to high healthcare standards, nutrition, and an overall high standard of living – all of which could be adopted by other industrial nations as well. But with high age comes less capacity, and Japan’s future enemy might not be an early death, but rather a struggling social network.