Measles Cases Surpass Full-Year 2025 Total as 299 Cases Reported in First Four Months, Minister Says

Japan’s health minister has called for increased measles vaccinations after 299 cases were reported between January 1 and April 12, 2026, already exceeding the total number of cases recorded in Japan for all of 2025.

The surge in measles cases comes amid a broader resurgence of the disease globally, with the United States reporting significant outbreaks in recent years. According to the CDC, as of April 16, 2026, 1,748 confirmed measles cases were reported in the United States during 2026, with 94% of those cases linked to outbreaks.

In 2025, the United States experienced 2,288 confirmed measles cases, marking the highest level since the disease was declared eliminated in the country in 2000. Health officials noted that 90% of those cases were outbreak-associated, reflecting sustained transmission in under-vaccinated communities.

The Japan Times first reported the health minister’s appeal, citing official data from Japan’s Ministry of Health, Labour and Welfare (MHLW). The minister, identified as Kenichiro Ueno, urged parents and caregivers to ensure children receive the measles vaccine, emphasizing that vaccination remains the most effective way to prevent infection and halt the spread of the virus.

Measles is a highly contagious viral disease that can lead to serious complications, including pneumonia, encephalitis, and death, particularly in young children and unvaccinated individuals. The MHLW recommends two doses of the measles-containing vaccine for routine immunization, with the first dose administered at age one and the second before entering elementary school.

Health authorities in Japan continue to monitor the situation closely, urging healthcare providers to report suspected cases promptly and to isolate infected individuals to prevent further transmission. Public health campaigns are being expanded to address vaccine hesitancy and improve immunization rates across all age groups.