Preliminary data from Japan’s 2025 national census (released May 2026) reveals that the country’s demographic crisis is accelerating. The nation just recorded the sharpest five-year population decline in its modern history.

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The Core Numbers

• Total Population: 123,049,524 (as of Oct. 1, 2025, includes foreign residents).
• The Loss: Down by 3,096,575 people since the 2020 census—a population loss equivalent to wiping out the entire city of Chicago in just five years.
• Rate of Decline: -2.5%. This is a massive acceleration compared to the 0.7% drop seen between 2015 and 2020.
• The Trend: This marks Japan’s third consecutive five-year decline since the census began in 1920.

Regional Shifts & Shrinking Homes

The population contraction is reshaping the country’s social fabric:

• Only Two Winners: Out of 47 prefectures, only Tokyo (+199,000) and Okinawa (+1,000) grew. The remaining 45 prefectures all shrank, led by Hokkaido, which lost 239,000 residents.
• More Homes, Fewer People: The total number of households hit a record 57.1 million, but the average household size shrank to just 2.15 people. This reflects a massive spike in elderly individuals living entirely alone.

The Underlying Cause

The shrinking population is driven by a widening gap between deaths and births. Newborns in Japan fell for the tenth consecutive year in 2025, hitting an all-time low of 705,809 births.

The Outlook: Despite government efforts ranging from child-rearing subsidies to state-funded dating apps, policymakers admit the decline is only deepening. Final, audited figures will be published in September.