Influenza Advisory Reissued in Tokyo
The Tokyo metropolitan government issued a new influenza advisory on Thursday, January 29, 2026, in response to a significant surge in influenza cases across the capital. This action is notable as it marks the first time in 17 years, specifically since the 2008-2009 flu season, that an advisory has been reissued after a previous warning was lifted within the same influenza season.
The decision comes as suspected influenza outbreaks at schools and social welfare facilities in Tokyo have exceeded 6,000 cases. Data from the week of January 19 to 25 revealed that the number of patients reported per designated medical institution in Tokyo reached 13.83. This figure surpasses the metropolitan government's established threshold of 10 patients per institution, which triggers the issuance of an advisory.
Previous Warnings and Contributing Factors
Earlier in the current flu season, the Tokyo metropolitan government had issued its initial influenza advisory in October, followed by a warning in November. Both of these measures were subsequently lifted as case numbers temporarily declined.
Authorities attribute the recent increase in infections to several factors, including heightened travel during the year-end and New Year holidays, as well as the reopening of schools. The 2025-2026 influenza season in Japan has been characterized by an unusually early start, with 39 prefectures nationwide exceeding warning levels by as early as December 2025.
Public Health Recommendations and Strain Information
In light of the reissued advisory, the Tokyo metropolitan government is urging residents to implement preventative measures. These recommendations include:
- Frequent handwashing
- Thorough disinfection
- Consistent mask-wearing
The current influenza season has seen the widespread circulation of a new mutant strain identified as 'Subclade K', a variant of the H3N2 influenza virus. This strain is noted for its faster speed of infection spread compared to previous variants. Common symptoms associated with this strain include a high fever of 38°C or higher, along with a runny or stuffy nose, cough, and sore throat. The broader influenza outbreak across Japan has already led to widespread school closures and placed considerable strain on healthcare facilities.
5 Comments
Habibi
While the focus on preventative measures like handwashing and masks is good, we need to ensure these measures don't disproportionately affect daily life or economic recovery. Finding a balance is crucial.
Bermudez
I appreciate the government's transparency about the rising numbers and the advisory threshold being met. Still, I wonder if the public fully understands why this particular reissuance is different from previous, short-lived warnings.
Mariposa
Too little, too late. The spread is already out of control.
Bella Ciao
The data on the new Subclade K strain is worrying, highlighting the need for vigilance. Yet, the article doesn't detail what new specific support is being offered to overwhelmed healthcare facilities beyond general advice.
Comandante
Finally, some proactive measures. We need to stop this spread.