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- Japan's Japanese population dropped below 120 million for the first time, with a record decrease of 916,744 people (0.76%) from the previous year.
- The number of foreign residents in Japan rose by 353,696 (9.62%) to 4,031,159, the highest since 2013 data collection began.
- Tokyo was the only prefecture where the Japanese population increased, while 46 prefectures saw declines, with Akita experiencing the largest drop (1.95%).
- Japan had a record low of 670,467 births in 2025, compared to 1,593,475 deaths, resulting in a natural population decline of 923,008.
- The combined Japanese and foreign population fell by 563,048 (0.45%) to 123,767,642, with Tokyo, Osaka, and Chiba being the only prefectures with overall population increases.