Japan’s total population peaked around 2008 at roughly 128 million people and has been falling every year since 2011. As of October 2024, the country’s population stood at about 123.8 million, according to Japan’s Statistics Bureau. That makes 2024 the fourteenth consecutive year of decline, with the country losing 550,000 people in a single year, a drop of 0.44 percent.
The Timeline of Decline
Japan’s population story has two important turning points. The first is when deaths began outnumbering births, a shift called “natural decrease.” That started in the mid-2000s and has continued ever since. A recent BBC report noted that the gap between deaths and births has widened for 16 straight years, meaning the country has been losing more people to death than it gains through childbirth since roughly 2008.
The second turning point is when the total population actually started shrinking. Immigration offset the natural decrease for a few years, but by 2011 the overall number began to fall and hasn’t recovered. Japan’s 2010 census captured the country near its all-time high, and every measurement since has been lower.
Rural Japan Felt It First
The national numbers mask how unevenly the decline has hit different parts of the country. Thirteen of Japan’s 47 prefectures were already losing people between 1990 and 1995, well before the national peak. The Chugoku and Shikoku regions on the western end of Honshu and the smaller southern island began shrinking between 1995 and 2000.
Since then, the pattern has spread dramatically. By the 2020 to 2025 period, projections from Japan’s National Institute of Population and Social Security Research show 44 of 47 prefectures in decline. Only three, Saitama (a Tokyo suburb), Shiga (near Kyoto), and Okinawa, were expected to still be growing. Even Tokyo and Osaka, the country’s two largest metro areas, have seen their share of the national population slip. Tokyo’s share dropped from 9.4 percent in 1995 and is projected to fall to 7.8 percent by 2025. Prefectures surrounding Tokyo and those with major regional cities like Nagoya, Fukuoka, and Sendai have held up better, absorbing younger workers from the countryside.
Seventeen prefectures are projected to lose more than 10 percent of their 1995 population by 2025. In practical terms, that means closed schools, shuttered businesses, and entire neighborhoods with more empty houses than occupied ones.
Why the Population Is Shrinking
Two forces drive the decline: a very low birth rate and an aging population. Japan’s fertility rate has been below the replacement level of roughly 2.1 children per woman since the mid-1970s. For decades, the population kept growing because the large generations born in the postwar baby boom were still alive. Once those cohorts began dying in large numbers while far fewer babies were being born, the math tipped.
Several social and economic factors keep the birth rate low. Housing in major cities is expensive. Work culture often demands long hours, making it difficult to raise children. Many young Japanese are delaying or forgoing marriage altogether, and births outside marriage remain rare compared to other wealthy nations. The cost of education, limited childcare availability, and stagnant wages for younger workers all contribute.
Japan also accepts relatively few immigrants compared to countries like the United States, Canada, or Germany. While immigration policy has loosened in recent years, the numbers remain far too small to offset the gap between births and deaths.
How Fast the Decline Is Accelerating
The pace is picking up. In the early 2010s, Japan was losing a few hundred thousand people per year. By 2024, the annual loss hit 550,000. The gap between deaths and births reached nearly a million in the most recent year of data, a record. Immigration filled some of that gap, which is why the net population loss was smaller than the natural decrease, but not nearly enough.
Looking at the FRED data from the Federal Reserve Bank of St. Louis, the trajectory is clear: 126.3 million in 2020, 125.1 million in 2022, 124.0 million in 2024. That’s a loss of more than 2 million people in just four years.
What the Projections Show
Japan’s population researchers have modeled several scenarios out to 2050 and 2100, with low, medium, and high variants depending on assumptions about future birth rates and immigration. None of the scenarios show a return to growth. The differences are only in how steep the decline will be. Under the medium projection, Japan’s population is expected to fall below 100 million by around mid-century. The low variant projects a much sharper drop.
The strain is already visible. Pension and healthcare systems built for a much larger working-age population are under growing pressure. Rural communities struggle to maintain infrastructure and services. Labor shortages affect industries from construction to elder care. These aren’t future problems. They’re the daily reality of a country that has been shrinking for over a decade and is losing people faster with each passing year.