Nikhil Prasad Fact checked by:Thailand Medical News Team Jul 17, 2026 1 hour, 14 minutes ago
Medical News: COVID-19 Activity Continues Upward Trend Across Japan
Japan has reported 5,482 new COVID-19 infections during Week 27, signaling a continued rise in nationwide viral activity despite remaining below the levels recorded during the same period last year. Health surveillance data showed the average number of cases per sentinel medical institution reached 1.47, compared with 1.08 in Week 26, extending a steady five-week upward trend. This
Medical News report highlights growing transmission patterns that health authorities are closely monitoring.
Japan's Week 27 COVID-19 surveillance shows rising nationwide infections, with southern prefectures and young
children driving the latest increase
For comparison, Japan recorded 7,615 cases with an average of 1.97 cases per sentinel clinic during the corresponding week in the previous year, indicating that although infections are increasing, they have not yet reached last year's intensity.
Southern Prefectures Experience the Highest Levels of Transmission
The latest surveillance data revealed that southern Japan continues to experience the greatest COVID-19 activity. Kagoshima recorded the highest burden with 13.09 cases per sentinel clinic, followed by Miyazaki (9.07), Ehime (8.08), Oita (7.26), Nagasaki (6.45), Saga (6.21), Kumamoto (4.09), Fukuoka (3.55), Tottori (3.21), and Yamaguchi (2.85).
In contrast, Japan's major metropolitan areas reported relatively modest activity. Tokyo recorded 0.22 cases per sentinel clinic, while Kanagawa reported 0.18, Osaka 1.00, Chiba 1.08, and Saitama 0.58, suggesting transmission remains comparatively limited in the country's largest urban centers.
Five Consecutive Weeks of Rising COVID-19 Activity
National surveillance demonstrates a consistent increase in infections over the past five weeks. The average number of cases per sentinel medical institution rose from 0.42 in Week 23, to 0.58 in Week 24, 0.85 in Week 25, 1.08 in Week 26, and finally 1.47 in Week 27. The uninterrupted upward progression indicates expanding community transmission and reinforces the importance of continued epidemiological monitoring.
Children Account for the Majority of Reported Cases
Age-specific data showed that children under 10 years old accounted for the largest proportion of infections, with 2,989 reported cases and 0.80 cases per sentinel clinic. The 10-14-year age group followed with 1,380 cases. Reported infections declined sharply among older age groups, including 241 cases among individuals aged 15-19, 113 among those aged 20-29, 221 in the 30-39 group, and progressively fewer cases among older adults.
Hospital data showed 140 new COVID-19 admissions during Week 27. Young children represented a significant share, including 17 infants under one year, 31 children aged 1-4 years, and 16 aged 5-9 years. Older adults also remained vulnerable, with 21 hospitalizations among those aged 70-79 years and 29 admissions among individuals aged 80 years and above.
Among hospitalized patients, only two required intensive care unit admission and two required mechanical ventilation, while 136 patients were managed without ICU care or ventilatory support, indicating that most hospitalized cases were not classified as critically severe.
What the Latest Surveillance Indicates
Although current infection numbers remain below those reported during the same period last year, the consistent week-on-week increase, concentration of cases among young children, and continued hospital admissions across both pediatric and elderly populations suggest that COVID-19 transmission is steadily expanding in Japan. Public health officials are likely to continue closely monitoring regional hotspots, particularly in southern prefectures, while assessing whether the current upward trajectory develops into a broader seasonal surge.
References:
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000121431_00485.html
https://www.mhlw.go.jp/content/001721088.pdf
https://mainichi.jp/english/covid19
For the latest COVID-19 news, keep on logging to Thailand
Medical News.
Read Also:
https://www.thailandmedical.news/news/who-data-shows-that-thailand-leads-the-world-with-7400-plus-covid-19-cases-in-the-last-28-days-since-28th-of-june
https://www.thailandmedical.news/news/taiwan-reports-more-than-2,000-outpatient-and-er-visits-last-week-due-to-covid-19
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