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Historic decline reveals the weight of a demographic crisis that Japan has faced for decades and now threatens fundamental pillars of the Japanese economy and society.
Japan recorded the largest population decline in its recent history, with a reduction of 2.5% between 2020 and 2025, according to preliminary census data released this Friday by the Japanese government, confirming a trend that experts and authorities have been following with growing concern since the beginning of the century.
The survey indicates that the country had 123 million inhabitants in 2025, a number that represents the loss of more than three million people compared to the previous census, conducted five years ago, during an interval that coincided with global challenges such as the Covid-19 pandemic and economic pressure on young families.
The government spokesperson, Minoru Kihara, was direct in commenting on the results, stating that the data “once again confirmed that the population decline in our country is worsening,” in a statement that reinforces the urgency with which Tokyo has addressed the issue in recent administrations.
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The Japanese census is conducted every five years and serves as the country’s main demographic thermometer, guiding public policy decisions in the areas of welfare, health, education, and urban infrastructure, making each edition a moment of great political and media attention in the country.
The fourth largest economy in the world faces a particularly difficult combination: one of the lowest birth rates on the planet and an accelerated aging population, two factors that feed into each other and simultaneously pressure the labor market, social security systems, and public health services.
Births declining for the tenth consecutive year
Census data reveals that the total number of births in the country fell for the tenth consecutive year in 2025, reaching only 705,809 babies throughout the year, a number that demographers point to as a sign that the pro-natal policies adopted so far have not been sufficient to change the trajectory.
The continuous decline in births is a consequence of a series of structural factors that have accumulated over decades, including the rising cost of living in large cities, labor market pressure on women, and changing cultural values regarding marriage and parenthood among younger generations.
Research conducted in Japan in recent years shows that a growing portion of young adults choose not to marry or to indefinitely delay marriage, and that even among those who are married, the decision to have children is often postponed or discarded due to economic conditions and the lack of adequate institutional support.
The aging population, in turn, creates increasing fiscal pressure on the pension system, which relies on active workers to finance retirees’ benefits — and with fewer young people entering the labor market, the imbalance tends to deepen in the coming decades.
Government strengthens incentive policies with still limited results
In recent years, local governments and the central Japanese administration have adopted a series of initiatives to try to reverse the trend, with measures ranging from encouraging marriage to increasing subsidies for families with children, including reforms in parental leave legislation.
Among the most unusual initiatives is the launch of dating apps sponsored by municipal governments, a strategy that seeks to facilitate the formation of new couples in a country where an intense professional agenda complicates the social life of many young workers in large metropolises.
The increase in subsidies for child-rearing and the expansion of allowances during parental leave are more traditional measures, but they have also been reinforced in recent years, with the central government pressuring employers to adopt work cultures more compatible with family life.
Despite the set of efforts, the results remain below the authorities’ expectations, and the country continues to face difficulties in reversing a trend that has consolidated over decades, making the demographic issue one of Japan’s main structural challenges for the coming decades.
Immigration is often pointed out by economists and international organizations as one of the most effective alternatives to compensate for the decline in the native population, but Prime Minister Sanae Takaichi advocates for stricter measures regarding the presence of foreigners in the country, a position that reflects a broad and sensitive debate in Japanese society about national identity and cultural integration.
Japan has one of the lowest foreign populations among developed countries, and any change in this policy is likely to face significant resistance, even in the face of data that increasingly clearly show that the country will need some form of population replacement to sustain its economy and public services in future generations.
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