Cold, Flu & Fever Treatment in Tokyo – English-Speaking Doctor

Cold, Flu & Fever Treatment in Tokyo — English-Speaking Doctor

When a cold, flu, or sudden fever strikes while you are living in or visiting Tokyo, the last thing you want is to struggle with a language barrier at a local clinic. At Tokyo Hub Clinic, located inside Hotel New Otani Garden Court 2F in central Tokyo, Dr. Ichiro Kamoshita, M.D., Ph.D. provides prompt, English-language diagnosis and treatment for all common respiratory and viral illnesses. As a board-certified internist, Dr. Kamoshita is specially trained to evaluate febrile conditions, distinguish between viral and bacterial infections, and prescribe the most effective treatment available in Japan.

Last updated: March 2026. Content supervised by medical professionals at Tokyo Hub Clinic.

Japan has its own unique seasonal illness patterns — influenza peaks from December through March, while summer brings hand-foot-and-mouth disease and heat-related illnesses. Whether you are dealing with a stubborn cough, high fever, body aches, or a sore throat that will not go away, our clinic provides same-week appointments in a comfortable, private hotel setting just minutes from Akasaka-mitsuke and Nagatacho stations.

Symptoms We Treat

Cold, flu, and fever-related illnesses encompass a wide range of symptoms. You should consider scheduling an appointment if you experience any of the following:

Fever (37.5°C / 99.5°F or above): persistent or recurring fever, chills, night sweats
Upper respiratory symptoms: runny nose, nasal congestion, sneezing, sore throat, hoarseness
Lower respiratory symptoms: cough (dry or productive), chest tightness, shortness of breath, wheezing
Influenza symptoms: sudden onset of high fever (38°C+), severe body aches, fatigue, headache, joint pain
Gastrointestinal symptoms with fever: nausea, vomiting, diarrhea — common in viral gastroenteritis (“stomach flu”)
Sinus and ear symptoms: facial pressure, ear pain, post-nasal drip, loss of smell or taste
General malaise: persistent fatigue, loss of appetite, dizziness, or a feeling that something is “not right”
COVID-19 concerns: any combination of the above symptoms, especially after known exposure or travel

Even if your symptoms seem mild, early evaluation can prevent complications. What starts as a simple cold can progress to bronchitis, sinusitis, or pneumonia — especially in individuals with asthma, diabetes, or other underlying conditions.

How We Diagnose and Treat Cold, Flu & Fever

Dr. Kamoshita’s approach combines thorough clinical evaluation with the diagnostic tools available at our clinic and partner laboratories:

Clinical assessment: A detailed history of your symptoms — when they started, how they have progressed, and any medications you have already tried. Physical examination includes throat inspection, lung auscultation, lymph node palpation, and temperature measurement.
Rapid testing: When clinically indicated, we can perform rapid influenza antigen tests, COVID-19 antigen tests, and streptococcal (strep throat) rapid tests. Results are typically available within 15–20 minutes.
Blood tests: For persistent or high fevers, blood tests (CBC, CRP, liver and kidney function) help determine whether the infection is viral or bacterial and whether any complications are developing.
Treatment and prescriptions: Based on the diagnosis, Dr. Kamoshita will prescribe appropriate medications. In Japan, antiviral medications like oseltamivir (Tamiflu) and baloxavir (Xofluza) are widely available and can be prescribed within the first 48 hours of influenza onset for maximum effectiveness. Antibiotics are prescribed only when a bacterial infection is confirmed or strongly suspected — we follow evidence-based guidelines to avoid unnecessary antibiotic use.
Symptom management: In addition to targeted treatment, we provide medications for symptom relief — fever reducers, cough suppressants, decongestants, throat lozenges, and anti-nausea medication as needed.

Japan offers several antiviral and anti-inflammatory medications that may not be available in your home country. Dr. Kamoshita will explain each medication, its purpose, and any potential side effects in clear English before prescribing.

What to Expect at Your Visit

We understand that when you are feeling unwell, you want efficient, comfortable care without unnecessary delays. Here is what your visit will look like:

Book your appointment: Call 03-6261-7070 or book online. If you have a fever, please mention this when booking so we can prepare accordingly.
Arrive at Hotel New Otani Garden Court 2F: Our hotel-based clinic provides a clean, quiet environment — ideal when you are feeling unwell. There is no crowded waiting room.
Consultation (15–25 minutes): Dr. Kamoshita will take a thorough history, examine you, and perform any rapid tests needed.
Diagnosis and treatment plan: You will receive a clear explanation of your condition and a prescription. We will explain how to pick up your medications at a nearby pharmacy.
Sick notes and documentation: If you need a medical certificate for work or school absence, we can issue one in English on the spot.
Follow-up if needed: For persistent symptoms or complications, we will schedule a follow-up visit. Dr. Kamoshita will monitor your recovery and adjust treatment as necessary.

Information for Expatriates and International Residents

Getting sick in a foreign country adds stress to an already unpleasant situation. Here is how Tokyo Hub Clinic makes the process easier for international patients:

Full English service: No Japanese language skills needed. From reception to consultation to pharmacy instructions, everything is communicated in English.
Familiar medication guidance: Dr. Kamoshita can explain the Japanese equivalents of common medications you may know from home (e.g., Tylenol, Advil, NyQuil). Japanese pharmacies carry different brands, and we bridge that knowledge gap.
Flu season preparedness: If you are new to Japan, you may not know that influenza vaccinations are widely available each autumn. We offer flu shots and can advise on Japan-specific seasonal health risks.
COVID-19 guidance: Regulations and testing requirements change frequently. We stay current on the latest guidelines and can provide the testing and documentation you need for work, travel, or peace of mind.
Workplace sick leave documentation: Japanese employers often require a doctor’s note (shindan-sho) for absences. We issue these in both English and Japanese upon request.

Insurance and Fees

We strive for transparent, predictable pricing:

Japan National Health Insurance (NHI) / Shakai Hoken: Standard copay (typically 30%). Consultations, rapid tests, and most prescriptions are covered.
International travel insurance: We provide all necessary documentation for reimbursement. Contact your insurer about direct billing options.
Self-pay: First visit approximately ¥10,000–¥15,000; follow-up visits approximately ¥5,000–¥8,000. Rapid tests and prescriptions may incur additional costs.

Cash and major credit cards are accepted. Itemized receipts are provided for every visit.

Frequently Asked Questions

Should I come in for a mild cold, or only for flu and high fever?

You are welcome to visit for any severity of illness. Mild colds can sometimes mask more serious conditions, and early treatment — especially for flu — is most effective when started within 48 hours of symptom onset. If you are unsure, call us and we can advise whether an in-person visit is recommended.

Can I get a flu test and COVID test at the same time?

Yes. We can perform rapid antigen tests for both influenza and COVID-19 during the same visit. Combined test kits are available, providing results for both viruses in approximately 15 minutes.

Is Tamiflu available in Japan?

Yes. Japan has broad availability of antiviral medications for influenza, including oseltamivir (Tamiflu), baloxavir (Xofluza), and others. These are most effective when started within 48 hours of symptom onset. Dr. Kamoshita will determine which antiviral is most appropriate for your case.

Can I get antibiotics for my cold?

Antibiotics are effective only against bacterial infections — they do not treat viral colds or flu. Dr. Kamoshita follows evidence-based prescribing guidelines and will prescribe antibiotics only when a bacterial infection is diagnosed or strongly suspected (e.g., bacterial sinusitis, strep throat, or pneumonia).

Do I need an appointment, or can I walk in?

Tokyo Hub Clinic operates on an appointment-only basis to ensure adequate time for each patient and to minimize waiting. For urgent cases, we do our best to accommodate same-day bookings — call 03-6261-7070 as early in the day as possible.

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Book an Appointment

03-6261-7070 · Hotel New Otani Garden Court 2F · Akasaka-mitsuke / Nagatacho Station
Appointment only · All consultations in English