Every spring, something in the air changes in Japan — and not in a pleasant way for everyone. If you’ve arrived in Tokyo, Kyoto, or just about anywhere outside the city center during late winter or spring and found yourself sneezing constantly, rubbing your eyes, and wondering if you’ve caught a terrible cold, you’re probably dealing with kafunshō (花粉症) — Japan’s seasonal hay fever.
\\n\\n\\n\\nLast updated: March 2026. Medically reviewed by the medical team at SAKURA International Clinic Asakusa.
\\n\\n\\n\\nYou’re far from alone. Japan has one of the highest rates of pollen allergy in the world, and even visitors who have never experienced hay fever back home often find themselves affected here. The good news: there’s a lot you can do about it, and knowing what to expect makes a big difference.
\\n\\n\\n\\nWhat Is Kafunshō? Japan’s Pollen Problem
\\n\\n\\n\\nKafunshō literally means “pollen illness” — and Japan has a lot of pollen to go around. The main culprit is sugi (cedar), a tree that covers vast stretches of Japan’s mountainous landscape. After World War II, sugi was planted extensively for timber, but demand for domestic wood declined and much of it was left standing. Today, those forests release enormous quantities of pollen every year.
\\n\\n\\n\\nClose behind cedar is hinoki (Japanese cypress), which follows the cedar season and extends hay fever misery well into spring. Together, these two trees are responsible for the bulk of pollen allergy cases in Japan.
\\n\\n\\n\\nIt’s estimated that around 40% of Japan’s population now has hay fever — a dramatic increase from just a few decades ago. The reasons are complex: years of sugi/hinoki pollen exposure, urban pollution acting as an irritant, and changes in lifestyle and diet. But whatever the cause, the result is the same: a country that takes pollen season very seriously.
\\n\\n\\n\\nFor tourists and expats, this matters because your immune system may react to Japanese pollen even if you’ve never had hay fever before. Japanese cedar pollen is a potent allergen, and first-time exposure can trigger a response in people who had no history of allergies.
\\n\\n\\n\\nWhen Is Pollen Season in Japan?
\\n\\n\\n\\nPollen season in Japan is not a short event — it runs for several months, and different plants take turns dominating the airborne allergen count. Here’s a rough calendar to plan around:
\\n\\n\\n\\n| Pollen Type | Peak Season | Region Notes |
|---|---|---|
| Japanese Cedar (sugi) | February – April | Starts earlier in Kyushu/Kansai, later in Tohoku |
| Japanese Cypress (hinoki) | March – May | Overlaps with cedar, extends the season |
| Grasses (Timothy, etc.) | May – October | Less severe but prolonged |
| Ragweed / Mugwort | August – October | Mainly late summer into autumn |
The absolute worst period for most people — locals and visitors alike — is mid-February through April. This is when cedar pollen counts are at their highest, especially on warm, windy days following rain. Tokyo, surrounded by cedar-dense mountains, is particularly hard hit.
\\n\\n\\n\\nJapanese weather services take pollen forecasting seriously. Apps like Yahoo! Weather Japan and the official meteorological service publish daily pollen count maps. Checking these before heading out can help you decide when to double up on precautions.
\\n\\n\\n\\nIf you’re planning a trip to Japan and are already prone to pollen allergies, timing your visit outside of February–April will significantly reduce your chances of suffering. But if your schedule doesn’t allow that, preparation is everything.
\\n\\n\\n\\nSymptoms — Is It Hay Fever or a Cold?
\\n\\n\\n\\nOne of the most common questions people ask when they start sneezing in Japan is: “Do I have a cold, or is this hay fever?” It’s a fair question, and the answer matters because the treatments are different.
\\n\\n\\n\\nHere are some key differences to help you tell them apart:
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- Fever: Colds can cause a low-grade fever; hay fever almost never does. If your temperature is elevated, lean toward a cold or flu. \\n
- Sneezing pattern: With hay fever, you often sneeze in rapid succession — five, ten times in a row. Cold sneezing tends to be more occasional. \\n
- Nasal discharge: Hay fever typically produces clear, watery discharge. A cold may start clear but often turns thick or yellowish after a few days. \\n
- Itching: This is the big one. Itchy eyes, itchy nose, itchy throat — these are classic hay fever symptoms. Colds rarely cause significant itching. \\n
- Eye redness and tearing: Allergic conjunctivitis (itchy, watery, red eyes) is very common with kafunshō in Japan. It’s much less typical with a cold. \\n
- Duration and pattern: Colds generally peak and resolve within 7–10 days. Hay fever persists as long as pollen counts remain high — weeks or months. \\n
- Time of day: Symptoms from hay fever often worsen in the morning when pollen counts are highest, and may improve indoors with air conditioning. \\n
If your symptoms match the hay fever profile and you’re visiting during pollen season, there’s a good chance that’s exactly what you’re dealing with. But if you’re unsure — especially if you have a fever, chest symptoms, or you feel genuinely unwell — it’s worth getting checked out by a doctor.
\\n\\n\\n\\nOTC Medicines for Hay Fever in Japan
\\n\\n\\n\\nJapan has a well-stocked pharmacy network, and you can find effective allergy medications at most drugstores without a prescription. The major chains — Matsumoto Kiyoshi, Welcia, Tsuruha Drug — are easy to find in any city and carry a solid range of antihistamines.
\\n\\n\\n\\nHere are some common OTC options you’ll encounter:
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- Allegra FX (fexofenadine) — One of the most popular choices in Japan. Non-drowsy, effective, and available without a prescription. You’ll see this branded exactly as “Allegra FX” on shelves. \\n
- Claritin (loratadine) — Another well-known non-drowsy option. Sold in Japan under the same brand name. \\n
- Zyrtec (cetirizine) — Also available OTC. May cause more drowsiness than the above two in some people. \\n
- Aleguia (bepotastine) — A Japanese brand effective for both nasal and eye symptoms. \\n
- Nasal sprays: Look for fluticasone-based sprays (e.g., Nasonex-style OTC options). These are particularly helpful if nasal congestion is your main complaint. \\n
- Eye drops: Japanese pharmacies have an excellent selection of antihistamine eye drops specifically for pollen allergies. Ask for 花粉症用目薬 (kafunshō-yō megusuri). \\n
Packaging in Japanese can be challenging to navigate. If you’re not sure what you’re picking up, don’t hesitate to use our Pharmacy Phrase Card — a handy guide to communicating your needs at Japanese pharmacies, with useful phrases and translations for allergy-related requests.
\\n\\n\\n\\nOne thing to keep in mind: if you’re already taking medications for other conditions, check for interactions before starting an antihistamine. When in doubt, a quick consultation with a doctor or pharmacist is the safest move.
\\n\\n\\n\\nPrescription Options for Severe Cases
\\n\\n\\n\\nOTC medicines work well for mild to moderate hay fever, but if your symptoms are severe — constant congestion, inability to sleep, significant impact on your daily activities — it may be time to consider prescription-strength treatment.
\\n\\n\\n\\nJapanese doctors have access to a range of prescription options that go well beyond what’s available over the counter:
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- Stronger antihistamines: Higher-dose versions of common antihistamines, or combinations that target both nasal and eye symptoms more aggressively. \\n
- Intranasal corticosteroids: Prescription-strength nasal sprays (fluticasone, mometasone, budesonide) that reduce inflammation effectively over a few days of use. \\n
- Leukotriene receptor antagonists: Montelukast and similar drugs are often prescribed alongside antihistamines for more complete relief. \\n
- Oral corticosteroids: Short courses for very severe, debilitating symptoms. Usually only for a few days to get things under control. \\n
- Xolair (omalizumab) injections: For very severe, treatment-resistant cases. Newer and not commonly needed for typical kafunshō. \\n
A doctor can also confirm whether what you’re experiencing is definitely hay fever and rule out other conditions — like a respiratory infection or a different type of allergy — that might need different treatment.
\\n\\n\\n\\nIf you’re dealing with more than just sneezing — itchy skin, hives, or other allergic reactions — take a look at our guide on allergies, rashes, and itching in Japan for more information on what might be going on and how to get help.
\\n\\n\\n\\nPrevention Tips for the Pollen Season
\\n\\n\\n\\nMedication helps, but reducing your exposure to pollen in the first place is just as important. Here’s what actually works:
\\n\\n\\n\\nWear a mask. Japan’s mask culture has always been strong during pollen season — long before masks became common for other reasons. A properly fitted surgical or N95 mask significantly reduces the amount of pollen you inhale. This one habit can make a real difference on high-count days.
\\n\\n\\n\\nTry pollen-blocking glasses. These look like wraparound glasses and have shields on the sides. They’re sold at pharmacies and convenience stores throughout Japan during pollen season. They may feel a little unusual at first, but they noticeably reduce eye irritation on high-pollen days.
\\n\\n\\n\\nCheck the daily pollen forecast. Several Japanese weather apps and websites publish real-time pollen maps. On days rated “very high” (非常に多い), consider limiting outdoor time, especially in the morning (roughly 6–10 AM), when pollen counts peak.
\\n\\n\\n\\nTake a shower when you return indoors. Pollen sticks to hair and clothes. A quick shower and changing into fresh clothes when you get home keeps pollen out of your living space.
\\n\\n\\n\\nKeep windows closed on high-pollen days. It’s tempting to open up on a warm spring day, but if pollen counts are high, you’re inviting the allergens inside. Use air conditioning with a filter instead.
\\n\\n\\n\\nUse air purifiers. Most hotels and many rental apartments in Japan have air purifiers with HEPA filters. Run them continuously during peak season — they make a surprisingly big difference.
\\n\\n\\n\\nAvoid drying laundry outdoors. Futons, clothes, and sheets hung outside will collect pollen. Use an indoor dryer or laundromat during high-count periods.
\\n\\n\\n\\nStart antihistamines before symptoms peak. If you know you’re prone to pollen allergies, many doctors recommend starting a daily antihistamine a week or two before peak season begins. This “pre-emptive” approach can significantly reduce how bad your symptoms get. If you’d like guidance on the right medication and timing, a visit to our clinic can help you set up a plan that fits your stay.
\\n\\n\\n\\nLiving with hay fever in Japan — even temporarily — is entirely manageable once you know what you’re dealing with. Millions of people navigate kafunshō every year, and with the right combination of medication, protective gear, and habit adjustments, you can get through pollen season without it derailing your time here.
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Related Pages
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- Allergies, Rashes & Itching in Japan — What to Do \\n
- Pharmacy Phrase Card — Communicate at Japanese Drugstores \\n
- Fever, Cold & Flu in Japan — Symptoms, Treatment, and When to See a Doctor \\n\\n
- Buying Medicine in Japan: Pharmacy Guide \\n\\n\\n
- Eye Problems in Japan \\n\\n
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Frequently Asked Questions
\\n\\n\\n\\nWhen is hay fever season in Japan?
\\n\\n\\n\\nCedar pollen (sugi) peaks from mid-February to April, affecting roughly 40% of Japan’s population. Cypress pollen follows from March to May. Tokyo and central Honshu are the worst-affected areas. Symptoms can start as early as late January in warmer years.
\\n\\n\\n\\nCan tourists get hay fever medicine in Japan without a prescription?
\\n\\n\\n\\nYes. Over-the-counter antihistamines like Allegra FX and Alesion are available at any pharmacy for ¥1,200–2,000. For stronger options like prescription-strength nasal steroids, visit a clinic. Pharmacists at major chains can recommend suitable OTC options in English.
\\n\\n\\n\\nWhat is kafunsho and how is it different from a cold?
\\n\\n\\n\\nKafunsho (花粉症) is the Japanese term for hay fever. Unlike a cold, it causes persistent clear runny nose, itchy eyes, and sneezing without fever or body aches. Symptoms last weeks and worsen outdoors, especially on windy days with high pollen counts.
\\n\\n\\n\\nHow can I check pollen levels in Tokyo?
\\n\\n\\n\\nUse the free Tenki.jp app or website, which provides daily pollen forecasts by region. NHK World broadcasts pollen alerts in English during spring. Pollen counts peak on warm, windy, dry days. The Japanese Weather Association also publishes real-time pollen data online.
\\n\\n\\n\\nShould I see a doctor for hay fever in Japan?
\\n\\n\\n\\nSee a doctor if OTC medications aren’t providing relief, or if you experience severe eye swelling, persistent cough, or asthma-like symptoms. Clinics can prescribe stronger antihistamines, steroid nasal sprays, and eye drops. A visit typically costs ¥3,000–5,000 with insurance.
\\n\\n\\n\\nNeed Help? We’re Here for You.
\\n\\n\\nSAKURA International Clinic Asakusa is open every day, 9:00–17:00, just one minute from Asakusa Station. Walk-ins welcome. All consultations in English.
\\n\\n\\n\\n\\n\\nComprehensive consultation: ¥55,000 (includes exam, prescription, basic tests, and medical certificate if needed).
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