Japan declares a quasi-state of emergency for Okinawa, Yamaguchi, and Hiroshima prefectures, which host U.S. military bases and are reporting an increase in the number of COVID-19 cases. The quasi-emergency measures will take effect on January 9.
Two U.S. Marine aircraft from Iwakuni air base crash off the coast of Shikoku, Japan, during a mid-air refueling. One serviceman is rescued by Japan's Maritime Self-Defense Force, while one is found dead and five are still reported missing.
Japan lowers the age of adulthood from 20 to 18, with the changes coming into effect in 2022. The revision to Japan's civil code means that 18-year-olds will be able to marry without their parents' consent, apply for credit cards and loans, and transgender people will be able to have their new gender officially recognised. The change causes confusion and concern regarding the kimono industry and Coming of Age Day.