Is This You?
\n\n\n\nIt’s day three of your Tokyo trip and you wake up with a scratchy throat. By noon, the cough has set in and you feel a faint chill creeping through your body. Could it be COVID? Your return flight is in three days. You start wondering: Do I need a test? Where can I even get one in English? What happens if I test positive — will I be stuck in Japan? Can I still board my plane? Take a breath. You’re not the first traveler to face this, and you have clear options. This page walks you through exactly what to do.
\n\n\n\nPossible Causes of Cough and Sore Throat in Tokyo
\n\n\n\nNot every cough in Tokyo means COVID. Several conditions can cause respiratory symptoms while you’re traveling in Japan, and understanding the possibilities helps you respond appropriately.
\n\n\n\nCOVID-19
\n\n\n\nNew variants continue to circulate in Japan year-round. While most cases in 2026 are milder than earlier waves, the virus still commonly causes sore throat, dry cough, fever, fatigue, and body aches. Symptoms typically appear 2–5 days after exposure and can overlap significantly with other respiratory infections.
\n\n\n\nSeasonal Cold and Influenza
\n\n\n\nFrom November through March, influenza and common cold viruses peak in Japan. Crowded trains, indoor heating, and close-quarter dining make transmission easy. Flu tends to hit harder and faster than a cold — sudden high fever, muscle pain, and exhaustion are telltale signs.
\n\n\n\nDry Air Irritation
\n\n\n\nJapan’s winter humidity can drop to 20–30%, and airplane cabins are even drier. This parches your throat and nasal passages, causing soreness and a dry, tickling cough — even without any infection. Hotel air conditioning worsens the effect overnight.
\n\n\n\nPollen Allergies (Spring)
\n\n\n\nFrom mid-February through April, Japanese cedar (sugi) and cypress (hinoki) pollen blankets much of Japan. If you’ve never been exposed to these species before, you may develop a cough, itchy throat, and sneezing for the first time.
\n\n\n\nPM2.5 and Air Pollution
\n\n\n\nOccasionally in spring, fine particulate matter drifts across from mainland Asia. While rarely severe in Tokyo, sensitive individuals may notice throat irritation and a persistent cough on high-pollution days.
\n\n\n\nWhat You Can Do Right Now — Over-the-Counter Remedies
\n\n\n\nJapanese pharmacies (ドラッグストア / drugstore) stock effective remedies you can buy without a prescription. Here’s what to look for:
\n\n\n\nFor Sore Throat
\n\n\n\n- Nodo Spray (のどスプレー) — antiseptic throat spray, available at any drugstore
- Ryukakusan (龍角散) — herbal throat powder or lozenges, a Japanese staple for over 200 years
- Lulu Attack EX (ルルアタックEX) — combination cold medicine that targets throat pain and inflammation
For Cough
\n\n\n\n- Medicon (メジコン) — cough suppressant tablets, widely available
- Bron (ブロン液) — liquid cough medicine, effective for persistent coughs
COVID-19 Antigen Test Kits
\n\n\n\nYou can buy rapid antigen test kits at most drugstores for around ¥1,000–¥2,000. Look for packages labeled 抗原検査キット (こうげんけんさキット / kougen kensa kitto). Choose kits marked 「医療用」 or 「第1類医薬品」 for the most reliable results. A pharmacist will need to hand it to you — point to the kit and say “kensa kitto kudasai.”
\n\n\n\nGargle Solution and Humidification
\n\n\n\n- Isodine (イソジン) — povidone-iodine gargle, excellent for sore throats
- Humidify your room: Request a humidifier from your hotel front desk, or hang a wet towel near the heater overnight. This alone can dramatically reduce throat irritation.
When to See a Doctor — Severity Guide
\n\n\n\nMild — Manageable with OTC Remedies
\n\n\n\n- Light, occasional cough
- Mild sore throat that improves with lozenges or gargling
- No fever or low-grade fever under 37.5°C
You can likely manage these symptoms with pharmacy remedies and rest. Monitor for worsening over 24–48 hours.
\n\nModerate — Visit Our Clinic
\n\n\n\n- You need a COVID-19 or influenza test (especially before a flight)
- Cough or sore throat lasting more than 3 days
- Fever of 38°C (100.4°F) or higher
- You need a negative test certificate or “Fit to Fly” document for your return flight
- Colored or thick phlegm (yellow, green, or brown)
- Symptoms worsening despite OTC medication
Severe — Call Us (Japan’s Emergency Number) Immediately
\n\n\n\n- Difficulty breathing or shortness of breath
- Chest pain or tightness
- Coughing up blood (hemoptysis)
- Oxygen saturation (SpO2) dropping below 93%
- Confusion, drowsiness, or inability to stay awake
call us for an ambulance. If you cannot speak Japanese, say “English please” — Tokyo’s emergency dispatch has multilingual support.
\n\nWhat to Expect at Our Clinic
\n\n\n\nAt SAKURA International Clinic Asakusa, we see travelers with respiratory symptoms every day. Here’s how your visit works:
\n\n\n\nStep 1: Contact Us Before You Arrive
\n\n\n\nMessage us on WhatsApp or call ahead to describe your symptoms. This allows us to prepare appropriate infection-control measures and minimize your wait time. We will confirm your appointment time and give you arrival instructions.
\n\n\n\nStep 2: Arrive at the Clinic
\n\n\n\nWe’re a 1-minute walk from Asakusa Station. Please wear a mask when you arrive — we’ll provide one if you don’t have one. Bring your passport and travel insurance documents if you have them.
\n\n\n\nStep 3: Testing
\n\n\n\nOur doctor will evaluate your symptoms and run the appropriate tests. A rapid antigen test gives results in about 15 minutes. If a PCR test is clinically needed, results are typically available the following day.
\n\n\n\nStep 4: Treatment and Documentation
\n\n\n\nBased on your results, we’ll prescribe medication and provide any certificates you need — a negative/positive test certificate, a “Fit to Fly” letter, or a medical report for your travel insurance claim. All documents are issued in English.
\n\n\n\nTravel Insurance for COVID-19 and Respiratory Illness
\n\n\n\nMost major travel insurance policies purchased after 2023 cover COVID-19-related medical expenses, including clinic visits, testing, medication, and hospitalization if needed. Many also cover trip interruption costs such as additional hotel nights and flight rebooking fees if you test positive and cannot fly on your original date.
\n\n\n\nBefore your visit, check your policy for:
\n\n\n\n- Whether COVID-19 is explicitly covered or excluded
- Whether you need to call a hotline before seeking treatment (some insurers require pre-authorization)
- Your coverage limit and deductible amount
- Whether you pay upfront and claim reimbursement, or if the insurer pays the clinic directly
Bring your insurance card or policy number to your appointment. We provide detailed English-language invoices and medical reports formatted for insurance claims, making the reimbursement process as smooth as possible.
\n\n\n\nWhat If I Test Positive for COVID-19?
\n\n\n\nThis is the question that causes the most anxiety for travelers, so let’s address it clearly.
\n\n\n\nJapan’s Current Rules (2026)
\n\n\n\nSince May 2023, Japan has no mandatory isolation or quarantine for COVID-19-positive individuals. COVID-19 is now classified as a Category V infectious disease — the same category as seasonal influenza. You are not legally required to isolate in your hotel room, and there are no government-enforced restrictions on your movement within Japan.
\n\n\n\nThat said, common courtesy applies: wear a mask in crowded places, wash your hands frequently, and avoid close contact with vulnerable individuals while you’re symptomatic.
\n\n\n\nCan I Still Fly Home?
\n\n\n\nThis depends on two factors: your destination country’s entry requirements and your airline’s policy.
\n\n\n\n- Destination country: Most countries dropped COVID-19 testing requirements for entry by 2024, but rules can change. Always check your destination’s latest entry requirements before heading to the airport.
- Airlines: Most major airlines in 2026 allow passengers with mild COVID-19 symptoms to board. However, if you have a visible high fever, severe coughing, or appear seriously unwell, the airline may request a medical certificate confirming you are fit to travel.
“Fit to Fly” Certificate
\n\n\n\nOur clinic can issue a “Fit to Fly” certificate — an English-language medical letter confirming that a physician has examined you and determined you are safe to travel by air. This document satisfies most airline requirements and gives you peace of mind at the boarding gate.
\n\n\n\nStaying at Your Hotel
\n\n\n\nMost hotels in Tokyo will allow you to continue your stay if you test positive, especially since there is no legal isolation mandate. If you need to extend your booking for recovery, inform the front desk — they are accustomed to handling this situation. Your travel insurance may cover the additional nights.
\n\n\n\nInsurance Coverage for COVID-19
\n\n\n\nMany travel insurance plans cover COVID-19-related costs including medical consultations, medication, extended hotel stays, and flight change fees. Contact your insurer’s 24-hour helpline as soon as you receive a positive result. We will provide all necessary documentation — test results, diagnosis letters, and itemized invoices — to support your claim.
\n\n\n\nPre-Flight Testing and Medical Certificates
\n\n\n\nIf your home country or airline requires a negative COVID-19 test before boarding, our clinic can help you meet those requirements efficiently.
\n\n\n\nRapid Antigen Test
\n\n\n\nResults available the same day, typically within 15–30 minutes. Suitable for countries and airlines that accept antigen test results. We issue an English-language certificate immediately after the test.
\n\n\n\nPCR Test
\n\n\n\nResults available by the following day. Required by some destinations that specifically mandate RT-PCR testing. Plan your visit at least 1–2 days before your departure to allow time for results.
\n\n\n\nWhat’s Included in the Certificate
\n\n\n\nOur test certificates are formatted to meet international standards and include:
\n\n\n\n- Full name (matching your passport)
- Passport number
- Date and time of sample collection
- Type of test performed (antigen or PCR)
- Test result (positive or negative)
- Name, address, and stamp of the issuing medical institution
- Physician’s signature
If your country requires a specific format or form, bring it to your appointment and we will complete it for you.
\n\n\n\nFrequently Asked Questions
\n\n\n\nWhere can I buy a COVID-19 antigen test kit in Tokyo?
\nRapid antigen test kits are sold at most drugstores (ドラッグストア) across Tokyo, including major chains like Matsumoto Kiyoshi, Welcia, Sundrug, and Don Quijote. They cost approximately ¥1,000–¥2,000. Look for packages labeled 抗原検査キット. For the most reliable results, choose kits classified as 「医療用」 (medical use) or 「第1類医薬品」 (Class 1 pharmaceutical). A pharmacist must hand it to you directly.
\nHow long does a PCR test result take?
\nAt our clinic, PCR test results are typically available by the following day. Rapid antigen tests, on the other hand, provide results within approximately 15 minutes. If you need a PCR result for your flight, we recommend visiting at least 1–2 days before your scheduled departure.
\nCan I board a plane if I test positive for COVID-19?
\nIn most cases, yes. As of 2026, the majority of airlines allow passengers with mild COVID-19 symptoms to fly. However, if you appear severely ill — high fever, persistent coughing, visible distress — some airlines may ask for a medical certificate. We can issue a “Fit to Fly” certificate confirming you have been examined and are safe to travel. Always check your specific airline’s current policy before heading to the airport.
\nWhat is a “Fit to Fly” certificate?
\nA “Fit to Fly” certificate is an official medical letter issued by a licensed physician stating that you have been examined and are medically cleared to travel by air. Airlines may request this document if you appear unwell at check-in or the boarding gate. Our clinic issues this certificate in English, signed and stamped, and it is accepted by all major international airlines.
\nHow much does a visit cost?
\nA standard consultation at SAKURA International Clinic Asakusa costs ¥55,000 (tax included). This is an all-inclusive fee covering the consultation, testing, medication, and any certificates you need (test result certificate, Fit to Fly letter, or insurance documentation). There are no hidden charges. We accept cash and major credit cards. If you have travel insurance, we provide detailed English invoices for reimbursement.
\nGet Help Now
\n\n\n\nDon’t wait until your symptoms get worse or your flight is hours away.
\n\n\n\n\n\n\n\nSAKURA International Clinic Asakusa
1-minute walk from Asakusa Station
Open daily 9:00–17:00, 365 days a year
Languages: English · Chinese · Korean · Japanese
No long waits. No paperwork maze. Just care.
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