Population density per pixel at 100 metre resolution. WorldPop provides estimates of numbers of people residing in each 100x100m grid cell for every low and middle income country. Through ingegrating cencus, survey, satellite and GIS datasets in a flexible machine-learning framework, high resolution maps of population counts and densities for 2000-2020 are produced, along with accompanying metadata. DATASET: Alpha version 2010 and 2015 estimates of numbers of people per grid square, with national totals adjusted to match UN population division estimates (http://esa.un.org/wpp/) and remaining unadjusted. REGION: Africa SPATIAL RESOLUTION: 0.000833333 decimal degrees (approx 100m at the equator) PROJECTION: Geographic, WGS84 UNITS: Estimated persons per grid square MAPPING APPROACH: Land cover based, as described in: Linard, C., Gilbert, M., Snow, R.W., Noor, A.M. and Tatem, A.J., 2012, Population distribution, settlement patterns and accessibility across Africa in 2010, PLoS ONE, 7(2): e31743. FORMAT: Geotiff (zipped using 7-zip (open access tool): www.7-zip.org) FILENAMES: Example - AGO10adjv4.tif = Angola (AGO) population count map for 2010 (10) adjusted to match UN national estimates (adj), version 4 (v4). Population maps are updated to new versions when improved census or other input data become available.

In 2020, the population of Tokyo Metropolis amounted to over 6,402 inhabitants per square kilometer. The number increased from approximately 5,517 inhabitants per square kilometer in 2000.

In 2023, approximately 9.4 million people within the age group of 15 to 64 years were counted in Tokyo Prefecture, an increase from about 8.94 million people recorded in 2020. Over 3.2 million inhabitants in the metropolis were aged 65 years and older.

Chart and table of population level and growth rate for the Tokyo, Japan metro area from 1950 to 2025. United Nations population projections are also included through the year 2035.

The statistic presents the population density in the Greater Tokyo Area in Japan from 1985 to 2015. In 1985, Greater Tokyo's population amounted to 2,240 inhabitants per square kilometer. This number increased to almost 2,700 inhabitants per square kilometer in 2015.

As of 2020, about 29 percent of the population in Japan was concentrated in the Greater Tokyo Area. The three metropolitan areas Tokyo, Osaka, and Nagoya, accounted for around 53 percent of the Japanese population.

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.

Adults with 100 thousand to one million U.S. dollars in wealth made up around 53 percent of the Japanese population in 2020, while the second largest share of people were worth between 10,000 and 100,000 dollars. Together, these groups accounted for approximately 86 percent of the population.

Wealth versus income

Wealth, as opposed to income, measures the ownership of assets in a society. Together with GDP, GDP per capita, and household disposable income, it helps to understand the economic well-being of households. Furthermore, the distribution of wealth gives an indication about the degree of equality in a society. Illustrated by its wealth distribution, Japan can be considered relatively equal compared to other countries.

Egalitarian corporate culture

In recent years, wealth inequality has become the subject of increasing focus among policymakers, academics and the general public. While several factors have contributed to the high equality in the country, it is safe to say that the egalitarian ethic in Japanese corporate culture is one of these reasons. This is reflected, for example, in the income structure; Japanese CEOs earn remarkably less than their counterparts in the United Kingdom or the United States. In a ranking of the average income of business leaders worldwide by country, Japan did not even make it into the list of the top ten countries.

The Global Human Footprint dataset of the Last of the Wild Project, version 2, 2005 (LWPv2) is the Human Influence Index (HII) normalized by biome and realm. The HII is a global dataset of 1 km grid cells, created from nine global data layers covering human population pressure (population density), human land use and infraestructure (built-up areas, nighttime lights, land use/land cover) and human access (coastlines, roads, navigable rivers).The Human Footprint Index (HF) map, expresses as a percentage the relative human influence in each terrestrial biome. HF values from 0 to 100. A value of zero represents the least influence -the "most wild" part of the biome with value of 100 representing the most influence (least wild) part of the biome.

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

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 March of 2025.

7.330,6 (Persons per 1 sq. km) in 2022.

In 2023, about 2.7 percent of the population in Japan were foreign nationals, up from about 1.7 percent in 2014. The total number of foreign residents in the same year amounted to approximately 3.4 million people.

Niijima Village(Niijima Mura)'s Percentage distribution of total population (65 and over) is 39.61% which is the 480th highest in Japan (by City). It also ranks 4th in Tokyo Prefecture. Transition Graphs and Comparison chart between Niijima Village and Kozagawa Town(Wakayama) and Fudai Village(Iwate)(Closest City in Population) are available. Various data can be downloaded and output in csv format for use in EXCEL free of charge.

Chart and table of population level and growth rate for the Osaka, Japan metro area from 1950 to 2025. United Nations population projections are also included through the year 2035.

According to a projection made in 2023, it was forecast that the number of people aged 65 years or older in Japan would increase from about 36.5 million in 2024 to around 37 million people by 2033. By contrast, the number of children, as well as the working-age population, was forecast to shrink in the same period.

Estimation results for detailed periods.

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.

We evaluated the effect of the Great Tohoku earthquake, which occurred on March 11, 2011 in Japan, on the genetic diversity and population structure of Pacific herring (Clupea pallasii). Pacific herring (n = 4466) were collected between 2003 and 2014 through more than 20 sampling events during spawning periods at nine spawning sites throughout the Pacific herring distribution range in Japan. We measured them and genotyped 3784 fish at five microsatellite loci. Following the tsunami, the sea-spawning population at the center of the affected area was almost extirpated and was replaced by a genetically distinct lagoon-spawning population from an adjacent brackish lake. However, the pattern of gene flow was stable for populations, with unique admixture proportions in local populations despite the high gene flow (FST = 0.0184). Our results indicate that Pacific herring in Japan spawn in a range of salinities and exchange genes between local populations regardless of the spawning ecotypes. We hypothesize that the combination of constant gene flow between local populations from straying of spawners and spawning fidelity creates weak but significantly differentiated stable population structure. This process can allow restoration of the genetic characteristics of damaged populations over many generations and can thereby promote the long-term viability of marine fishes that have high gene flow.

In anurans, female polyandry under male harassment is distributed across taxa because of external aquatic fertilisation. According to the sexual selection theory, male–male competition for access to females is affected by the operational sex ratio (OSR) and population density. The Japanese common toad, Bufo japonicus, is widespread in mainland Japan, and like the European common toad, B. bufo, it engages in explosive breeding. We observed the breeding behaviour of B. japonicus in isolated local populations for three years in two breeding ponds with different population sizes and densities: large-low (L-pond) and small-high (S-pond). We analysed the relative polyandry ratio in egg clutches laid by females and estimated the size-assortative mating pattern to be an indicator of male–male competition in the two ponds. Both ponds tended to exhibit a size-assortative mating pattern; however, the frequency of polyandry was different in the two ponds (L-pond = 20% and S-pond = 90%). We also found that polyandry could occur without multiple amplexus with a high population density, i.e. eggs were often fertilised by free-swimming sperm in the small shallow pond. We propose that high female polyandry ratios without continuous male harassment are generated because of a male-biased OSR and a high population density in the small pond.