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.

The total population in Japan was estimated at 123.6 million people in 2024, according to the latest census figures and projections from Trading Economics. This dataset provides - Japan Population - actual values, historical data, forecast, chart, statistics, economic calendar and news.

Throughout the Common Era, Japan's population saw relatively steady growth between each century. Failed invasions and distance from Asia's mainland meant that Japan was unaffected by many pandemics, primarily bubonic plague, therefore its development was not drastically impeded in the same way as areas such as China or Europe. Additionally, religious practices meant that hygiene was prioritized much more in Japan than in other regions, and dietary customs saw lower rates of meat consumption and regular boiling of water in meals or tea; both of these factors contributed to lower rates of infection for many parasitic or water-borne diseases. Fewer international conflicts and domestic stability also saw lower mortality in this regard, and Japan was an considered an outlier by Asian standards, as some shifting trends associated with the demographic transition (such as lower child mortality and fertility) began taking place in the 17th century; much earlier time than anywhere else in the world. Yet the most significant changes came in the 20th century, as Japan's advanced healthcare and sanitation systems saw drastic reductions in mortality. Challenges Japan's isolation meant that, when pandemics did arrive, the population had less protection and viruses could have higher mortality rates; smallpox has been cited as the deadliest of these pandemics, although increased international contact in the late 19th century brought new viruses, and population growth slowed. Earlier isolation also meant that crop failure or food shortages could leave large sections of the population vulnerable, and, as mentioned, the Japanese diet contained relatively little meat, therefore there was a higher reliance on crops and vegetables. It is believed that the shortage of arable land and the acidity of the soil due to volcanic activity meant that agriculture was more challenging in Japan than on the Asian mainland. For most of history, paddy fields were the most efficient source of food production in Japan, but the challenging nature of this form of agriculture and changes in employment trends gradually led to an increased reliance in imported crops. Post-Sakoku Japan Distance from the Asian mainland was not the only reason for Japan's isolation; from 1603 to 1853, under the Tokugawa shogunate, international trade was restricted, migration abroad was forbidden, and most foreign interaction was centered around Nagasaki. American neo-imperialism then forced Japan to open trade with the west, and Japan became an imperial power by the early-1900s. Japanese expansion began with a series of military victories against China and Russia at the turn of the century, and the annexation of Taiwan, Korea, and Manchuria by the 1930s, before things escalated further during its invasion of China and the Second World War. Despite its involvement in so many wars, the majority of conflicts involving Japan were overseas, therefore civilian casualties were much lower than those suffered by other Asian countries during this time. After Japan's defeat in 1945, its imperial ambitions were abandoned, it developed strong economic ties with the West, and had the fastest economic growth of any industrial country in the post-WWII period. Today, Japan is one of the most demographically advanced countries in the world, with the highest life expectancy in most years. However, its population has been in a steady decline for over a decade, and low fertility and an over-aged society are considered some of the biggest challenges to Japanese society today.

Total current population for Japan in 2025 is 121,960,408, a 0.55% decline from 2024.

<ul style='margin-top:20px;'>

<li>Total population for Japan in 2024 was <strong>122,631,432</strong>, a <strong>1.51% decline</strong> from 2023.</li>
<li>Total population for Japan in 2023 was <strong>124,516,650</strong>, a <strong>0.49% decline</strong> from 2022.</li>
<li>Total population for Japan in 2022 was <strong>125,124,989</strong>, a <strong>0.44% decline</strong> from 2021.</li>
</ul>Total population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship. The values shown are midyear estimates.

Key information about Japan population

• The Japan population reached 123.7 million people in Dec 2024, compared with the previously reported figure of 124.3 million people in Dec 2023
• The data reached an all-time high of 128.1 million people in Dec 2010 and a record low of 43.4 million people in Dec 1899

• In the latest reports, Japan Unemployment Rate increased to 2.5 % in Oct 2024
• Monthly earnings of the Japan population was 1,957.4 USD in Oct 2024
• Japan Labour Force Participation Rate remained the same rate at 63.5 % in Oct 2024

Population growth (annual %) in Japan was reported at --0.48737 % in 2023, according to the World Bank collection of development indicators, compiled from officially recognized sources. Japan - Population growth (annual %) - actual values, historical data, forecasts and projections were sourced from the World Bank on June of 2025.

Population ages 0-14 (% of total population) in Japan was reported at 11.65 % in 2023, according to the World Bank collection of development indicators, compiled from officially recognized sources. Japan - Population ages 0-14 (% of total) - actual values, historical data, forecasts and projections were sourced from the World Bank on June of 2025.

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.

Throughout the Common Era, until the 18th century, Japan's average population growth rate was significantly higher that those of Europe or China. Japan's relative isolation meant that it was not subjected to the same devastating pandemics during this period (especially plague), which caused regular spikes in mortality across Eurasia. During the period between 1700 and 1850, China and Western Europe's growth rates rose significantly due to improvements in food supply, water treatment, and more infrequent pandemics; as well as the spread of vaccination in Europe. In the late-19th and 20th centuries, population growth was high in all three regions, due to the onset of the demographic transition.

Population, female (% of total population) in Japan was reported at 51.19 % in 2023, according to the World Bank collection of development indicators, compiled from officially recognized sources. Japan - Population, female (% of total) - actual values, historical data, forecasts and projections were sourced from the World Bank on May of 2025.

Japan JP: Population: Female: Aged 0-14 data was reported at 7,950,363.000 Person in 2017. This records a decrease from the previous number of 7,993,231.000 Person for 2016. Japan JP: Population: Female: Aged 0-14 data is updated yearly, averaging 11,629,233.000 Person from Dec 1960 (Median) to 2017, with 58 observations. The data reached an all-time high of 13,688,228.000 Person in 1960 and a record low of 7,950,363.000 Person in 2017. Japan JP: Population: Female: Aged 0-14 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. Female population between the ages 0 to 14. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship.; ; World Bank staff estimates using the World Bank's total population and age/sex distributions of the United Nations Population Division's World Population Prospects: 2017 Revision.; Sum; Relevance to gender indicator: Knowing how many girls, adolescents and women there are in a population helps a country in determining its provision of services.

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.

Population ages 05-09, male (% of male population) in Japan was reported at 4.1806 % in 2023, according to the World Bank collection of development indicators, compiled from officially recognized sources. Japan - Population ages 5-9, male (% of male population) - actual values, historical data, forecasts and projections were sourced from the World Bank on June of 2025.

In 1938, the year before the outbreak of the Second world War, the countries with the largest populations were China, the Soviet Union, and the United States, although the United Kingdom had the largest overall population when it's colonies, dominions, and metropole are combined. Alongside France, these were the five Allied "Great Powers" that emerged victorious from the Second World War. The Axis Powers in the war were led by Germany and Japan in their respective theaters, and their smaller populations were decisive factors in their defeat. Manpower as a resource In the context of the Second World War, a country or territory's population played a vital role in its ability to wage war on such a large scale. Not only were armies able to call upon their people to fight in the war and replenish their forces, but war economies were also dependent on their workforce being able to meet the agricultural, manufacturing, and logistical demands of the war. For the Axis powers, invasions and the annexation of territories were often motivated by the fact that it granted access to valuable resources that would further their own war effort - millions of people living in occupied territories were then forced to gather these resources, or forcibly transported to work in manufacturing in other Axis territories. Similarly, colonial powers were able to use resources taken from their territories to supply their armies, however this often had devastating consequences for the regions from which food was redirected, contributing to numerous food shortages and famines across Africa, Asia, and Europe. Men from annexed or colonized territories were also used in the armies of the war's Great Powers, and in the Axis armies especially. This meant that soldiers often fought alongside their former-enemies. Aftermath The Second World War was the costliest in human history, resulting in the deaths of between 70 and 85 million people. Due to the turmoil and destruction of the war, accurate records for death tolls generally do not exist, therefore pre-war populations (in combination with other statistics), are used to estimate death tolls. The Soviet Union is believed to have lost the largest amount of people during the war, suffering approximately 24 million fatalities by 1945, followed by China at around 20 million people. The Soviet death toll is equal to approximately 14 percent of its pre-war population - the countries with the highest relative death tolls in the war are found in Eastern Europe, due to the intensity of the conflict and the systematic genocide committed in the region during the war.

japan - Population for Japan was 50.00000 Mil. of Persons in April of 2025, according to the United States Federal Reserve. Historically, japan - Population for Japan reached a record high of 127.27000 in May of 2022 and a record low of -43.75000 in December of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for japan - Population for Japan - last updated from the United States Federal Reserve on July of 2025.

Urban population (% of total population) in Japan was reported at 92.04 % in 2023, according to the World Bank collection of development indicators, compiled from officially recognized sources. Japan - Urban population (% of total) - actual values, historical data, forecasts and projections were sourced from the World Bank on June of 2025.

japan - Population Growth for Japan was -0.48737 % Chg. at Annual Rate in January of 2023, according to the United States Federal Reserve. Historically, japan - Population Growth for Japan reached a record high of -0.44385 in January of 2022 and a record low of -0.48737 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for japan - Population Growth for Japan - last updated from the United States Federal Reserve on July of 2025.

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 Apr 2025 about working-age, 15 to 64 years, Japan, and population.

JP: Population: Male: Ages 60-64: % of Male Population data was reported at 6.435 % in 2017. This records a decrease from the previous number of 6.651 % for 2016. JP: Population: Male: Ages 60-64: % of Male Population data is updated yearly, averaging 4.858 % from Dec 1960 (Median) to 2017, with 58 observations. The data reached an all-time high of 7.840 % in 2010 and a record low of 3.054 % in 1960. JP: Population: Male: Ages 60-64: % of Male 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: Population and Urbanization Statistics. Male population between the ages 60 to 64 as a percentage of the total male population.; ; World Bank staff estimates based on age/sex distributions of United Nations Population Division's World Population Prospects: 2017 Revision.; ;

Chart and table of population level and growth rate for the Tokyo, Japan metro area from 1950 to 2025.