by Rachel Anne
As we step into 2025, Japan is experiencing a significant uptick in influenza cases. With more than 317,000 cases reported in just one week in December 2024, this year’s flu season is proving to be particularly intense. Whether you're a local resident, a foreigner, or a visitor, it’s important to stay informed about how to prevent the flu, what to do if you catch it, and how to keep yourself and others safe.
Here’s everything you need to know to navigate the flu season in Japan :
Understanding the Flu Situation in Japan
The flu season in Japan typically peaks during the colder months, from November to February, with December usually seeing the highest number of cases. In early 2025, the country has seen its highest number of influenza infections in years, with public health officials urging residents to take extra precautions to avoid spreading the virus. While influenza usually causes mild to moderate illness, it can lead to serious complications, especially for the elderly, young children, and individuals with preexisting health conditions.
How to Prevent Influenza in Japan
Prevention is key to protecting yourself and your loved ones from the flu. Here are some essential steps you can take to reduce your risk of infection :
The most effective way to prevent the flu is through vaccination. Each year, a new flu vaccine is released that targets the most common strains of the virus circulating in Japan. It’s recommended that everyone, especially those in high-risk categories, get the flu shot. Vaccines are available at clinics, hospitals, and pharmacies across the country.
Tip : Vaccination takes about two weeks to become fully effective, so get your shot as soon as possible to ensure protection throughout the season.
Maintaining proper hygiene can go a long way in preventing the flu from spreading.
Wash Your Hands : Wash your hands thoroughly with soap and water, especially after coughing or sneezing. If soap and water aren’t available, use an alcohol-based hand sanitizer.
Cover Your Coughs and Sneezes : Use a tissue or the inside of your elbow to cover your nose and mouth. Dispose of tissues properly, and wash your hands afterward.
Avoid Touching Your Face: Flu viruses can spread easily when they come into contact with the eyes, nose, or mouth, so avoid touching your face to reduce the risk of infection.
During flu season, it’s wise to avoid close contact with people who are showing symptoms of illness, such as coughing, sneezing, or a fever. If you can, maintain a one-meter distance from anyone who appears unwell, and avoid crowded places when possible.
Ventilate Your Space : Open windows to let fresh air circulate and help reduce the concentration of airborne viruses.
Disinfect High-Touch Surfaces: Frequently clean items such as doorknobs, light switches, and your phone, as these can easily carry germs.
If you start feeling flu-like symptoms, it’s important to act quickly. Early treatment can help reduce the severity of the illness and prevent complications. Here's what you should do :
Stay Home and Rest
If you suspect you have the flu, stay home to rest and recover. Avoid going to work, school, or public places to prevent spreading the virus to others. Stay in a separate room if possible, and limit contact with others in your household.
Seek Medical Help
Consult a Doctor : If you develop flu symptoms such as a fever, chills, sore throat, body aches, or fatigue, contact a doctor. Antiviral medications can help reduce the severity and duration of the flu, but they must be taken within the first 48 hours of symptom onset.
Emergency Care : If symptoms worsen, such as difficulty breathing, chest pain, or persistent fever, seek medical help immediately.
Stay Hydrated and Rest
Drink plenty of fluids to stay hydrated and support your recovery. Resting is crucial for your body to fight off the virus.
If you’re visiting Japan as a tourist during the flu season, it's important to take the same preventive steps to avoid contracting or spreading the flu. In addition, here are a few specific tips for tourists :
Get Vaccinated Before Your Trip
While Japan’s seasonal flu vaccine is available for residents, tourists are encouraged to get vaccinated before traveling. If you’re planning to visit Japan during flu season, it’s best to get the flu vaccine in your home country prior to your trip. Most countries offer flu vaccinations to travelers, and it’s an important step for protecting yourself while abroad.
Pack Essential Hygiene Items
Be sure to carry essential hygiene products, such as hand sanitizer, disinfectant wipes, and tissues, with you while traveling. These will help you stay clean and hygienic, especially in crowded areas like airports, public transport, and tourist attractions.
Monitor Your Health
If you start feeling unwell while in Japan, don’t ignore it. Seek medical help immediately if you notice flu-like symptoms. Japan has a robust healthcare system, and many hospitals and clinics offer services in English for international tourists.
Tourist Health Insurance : If you’re not already covered, make sure to get travel health insurance that includes medical treatment for illnesses like the flu. This will provide peace of mind and ensure you can receive care without worrying about the cost.
Follow Local Guidelines
If you're feeling unwell while visiting Japan, follow local guidelines regarding quarantine, medical treatment, and self-isolation. If you’re sick, it’s important to stay in your accommodation until you're no longer contagious. Local authorities may have additional recommendations or restrictions, so stay informed during your stay.
Additional Tips for a Healthy Immune System
While following the above flu prevention measures is vital, strengthening your immune system can also help protect you from getting sick :
Eat Well : Make sure your diet includes plenty of fruits, vegetables, and protein to support your immune system.
Get Enough Sleep : Aim for 7-9 hours of sleep each night to help your body stay strong.
Exercise Regularly : Physical activity boosts the immune system, so try to stay active during the flu season.
While influenza is a serious health concern in Japan during the winter months, you can take steps to protect yourself and others. By getting vaccinated, practicing good hygiene, and staying home when you're sick, you can reduce your chances of contracting or spreading the flu.
Whether you’re a resident, a foreign worker, or a tourist in Japan, ensuring you follow the proper precautions will help you stay healthy and safe during flu season. Here’s to a healthier 2025!
Posted 12 February 2025
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