{"id":255,"date":"2026-03-19T11:06:01","date_gmt":"2026-03-19T02:06:01","guid":{"rendered":"https:\/\/hub-clinic.tokyo\/en\/?p=255"},"modified":"2026-03-31T00:36:39","modified_gmt":"2026-03-30T15:36:39","slug":"hay-fever-japan-kafunsho","status":"publish","type":"post","link":"https:\/\/hub-clinic.tokyo\/en\/hay-fever-japan-kafunsho\/","title":{"rendered":"Hay Fever in Japan (Kafunsho): An Expats Survival Guide"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">If you&#8217;ve recently moved to Japan and suddenly find yourself sneezing, congested, and rubbing itchy eyes every spring, you&#8217;re not imagining things. Japan has one of the highest rates of hay fever (<strong>kafunsho \/ \u82b1\u7c89\u75c7<\/strong>) in the world, affecting an estimated <strong>40\u201350% of the population<\/strong>. And if you&#8217;ve never had allergies before, that doesn&#8217;t make you immune \u2014 many expats develop hay fever for the first time after one or two seasons in Japan.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide explains why hay fever is so severe in Japan, what triggers it, and \u2014 most importantly \u2014 how to manage it effectively.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Is Hay Fever So Bad in Japan?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The answer lies in a post-war forestry policy. After World War II, the Japanese government planted massive quantities of <strong>Japanese cedar (sugi \/ \u30b9\u30ae)<\/strong> and <strong>Japanese cypress (hinoki \/ \u30d2\u30ce\u30ad)<\/strong> trees to support construction. These trees now cover approximately 12% of Japan&#8217;s land area, and they produce enormous quantities of pollen every spring.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The result is a pollen load that dwarfs what you&#8217;d experience in most other countries. On peak days in Tokyo, pollen counts can exceed <strong>100 grains per cubic meter<\/strong> \u2014 and the particles are small enough to penetrate deeply into nasal passages.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Pollen Calendar<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding the timing helps you prepare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cedar (Sugi) pollen:<\/strong> Mid-February to late April \u2014 this is the primary culprit and the most intense period<\/li>\n<li><strong>Cypress (Hinoki) pollen:<\/strong> Late March to mid-May \u2014 overlaps with cedar season, extending the misery<\/li>\n<li><strong>Grass pollen:<\/strong> May to August \u2014 affects some people but is less intense than tree pollen<\/li>\n<li><strong>Ragweed and other weeds:<\/strong> August to October \u2014 a minor secondary season<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For most sufferers, the worst period is <strong>late February through mid-April<\/strong>, when cedar pollen peaks. Warm, dry, windy days produce the highest pollen dispersal.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms of Kafunsho<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Classic hay fever symptoms in Japan include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Persistent sneezing (often in rapid sequences)<\/li>\n<li>Runny nose with clear, watery discharge<\/li>\n<li>Nasal congestion<\/li>\n<li>Itchy, watery, red eyes<\/li>\n<li>Itchy throat and ears<\/li>\n<li>Fatigue and difficulty concentrating (&#8220;allergy brain fog&#8221;)<\/li>\n<li>Headache<\/li>\n<li>Skin irritation, particularly around the eyes and nose<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In severe cases, hay fever significantly impairs quality of life \u2014 disrupting sleep, reducing work productivity, and making outdoor activities miserable. Some studies estimate that hay fever costs the Japanese economy over <strong>\u00a5600 billion per year<\/strong> in lost productivity.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Over-the-Counter Options at Japanese Pharmacies<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Japanese pharmacies (yakkyoku \/ \u85ac\u5c40) carry a wide range of allergy medications, many of which are effective and available without prescription. Here&#8217;s what to look for:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Antihistamine Tablets<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Allegra FX (fexofenadine 60mg):<\/strong> Non-drowsy, twice daily. One of the most popular OTC options in Japan. Equivalent to prescription Allegra in many countries.<\/li>\n<li><strong>Claritin EX (loratadine 10mg):<\/strong> Non-drowsy, once daily.<\/li>\n<li><strong>Alesion (epinastine):<\/strong> Available in 10mg and 20mg. The 20mg version is once-daily and mildly sedating.<\/li>\n<li><strong>Contac Nasal Attack (cetirizine):<\/strong> Effective but may cause mild drowsiness.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Nasal Sprays<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>AG Nose Allercut (beclomethasone):<\/strong> Steroid nasal spray \u2014 the most effective topical treatment for nasal symptoms. Use daily during the season for best results.<\/li>\n<li><strong>Nazal Spray (naphazoline):<\/strong> Decongestant spray. Provides quick relief but should NOT be used for more than 3\u20135 days (causes rebound congestion).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Eye Drops<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>AG Eyes Allercut (chlorpheniramine + others):<\/strong> Antihistamine eye drops for itchy, red eyes.<\/li>\n<li><strong>Alguard (ketotifen):<\/strong> Mast cell stabilizer. Good for preventive daily use.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tip:<\/strong> Start taking antihistamines <strong>2 weeks before the season begins<\/strong> (early February in Tokyo). This &#8220;pre-treatment&#8221; approach is significantly more effective than waiting until symptoms appear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Prescription Options<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If OTC medications aren&#8217;t sufficient, a doctor can prescribe stronger options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bilastine (Bilanoa):<\/strong> A newer-generation antihistamine that&#8217;s non-drowsy and effective. Popular in Japan.<\/li>\n<li><strong>Desloratadine (Desalex):<\/strong> Once-daily, non-drowsy.<\/li>\n<li><strong>Montelukast (Singulair\/Kipres):<\/strong> A leukotriene receptor antagonist. Particularly helpful for nasal congestion and patients with concurrent asthma.<\/li>\n<li><strong>Stronger steroid nasal sprays:<\/strong> Fluticasone (Flonase equivalent) or mometasone at prescription strength.<\/li>\n<li><strong>Sublingual immunotherapy (SLIT):<\/strong> A long-term treatment that gradually desensitizes you to cedar pollen. Available in Japan as Cedarcure (\u30b7\u30c0\u30ad\u30e5\u30a2). Requires a 3\u20135 year commitment but can produce lasting improvement. Must be started outside of pollen season (June\u2013November).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Non-Medication Strategies<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Medication alone may not be enough during peak season. These practical strategies can significantly reduce your pollen exposure:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Wear a mask outdoors:<\/strong> Standard surgical masks block a significant portion of pollen particles. Japan&#8217;s mask culture makes this socially seamless.<\/li>\n<li><strong>Wear glasses or sunglasses:<\/strong> Reduces pollen contact with eyes. Dedicated &#8220;pollen guard&#8221; glasses are sold at pharmacies and opticians.<\/li>\n<li><strong>Check the pollen forecast:<\/strong> Weather apps in Japan include pollen count forecasts. The Japan Weather Association (tenki.jp) provides detailed regional data.<\/li>\n<li><strong>Shower and change clothes after being outdoors:<\/strong> Pollen clings to hair, clothing, and skin.<\/li>\n<li><strong>Keep windows closed during peak hours:<\/strong> Pollen counts are highest between 11 AM and 3 PM, and again around sunset.<\/li>\n<li><strong>Use an air purifier indoors:<\/strong> HEPA-filter air purifiers are widely available in Japan (Sharp, Daikin, Panasonic). Many Japanese households run them continuously during pollen season.<\/li>\n<li><strong>Dry laundry indoors:<\/strong> Hanging laundry outside during pollen season coats your clothes and sheets with pollen.<\/li>\n<li><strong>Nasal irrigation (nasal rinse):<\/strong> Using a saline rinse (Hana Clean or similar products available at pharmacies) physically flushes pollen from nasal passages. Highly effective as a complement to medication.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">When to See a Doctor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Consider visiting a clinic if:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>OTC medications aren&#8217;t controlling your symptoms<\/li>\n<li>Your symptoms are severely affecting sleep or work performance<\/li>\n<li>You&#8217;re experiencing asthma-like symptoms (wheezing, chest tightness)<\/li>\n<li>You want to explore sublingual immunotherapy for long-term relief<\/li>\n<li>You&#8217;re unsure whether your symptoms are allergies, a cold, or something else<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A doctor can perform a blood test (IgE antibody test) to confirm exactly which allergens you&#8217;re sensitized to \u2014 cedar, cypress, dust mites, or others. This information helps tailor your treatment plan.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Living with Kafunsho<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hay fever in Japan is a fact of life for nearly half the population. As an expat, you&#8217;re far from alone in dealing with it. With the right combination of pre-treatment, daily medication, and environmental precautions, most people can manage their symptoms well enough to enjoy spring in Tokyo \u2014 cherry blossoms included.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Related Articles<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/en\/column\/flu-season-tokyo-expats\/\">Flu Season in Tokyo: What Expats Should Know<\/a><\/li>\n<li><a href=\"\/en\/column\/jet-lag-travel-fatigue-when-to-see-doctor\/\">Jet Lag and Travel Fatigue: When to See a Doctor<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n\n<div class=\"wp-block-button has-custom-font-size has-large-font-size\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/hub-clinic.tokyo\/en\/booking\/\" style=\"border-radius:8px;background-color:#2563eb\">Book an Appointment<\/a><\/div>\n\n<\/div>\n\n\n\n<p class=\"has-text-align-center has-small-font-size wp-block-paragraph\"><strong>Tokyo Hub Clinic<\/strong> \u2014 Hotel New Otani Garden Court 2F, Akasaka-Mitsuke \/ Nagatacho<br>Tel: 03-6261-7070 | By appointment only | All consultations in English<br>Dr. Ichiro Kamoshita, M.D., Ph.D. | Initial visit: approx. \u00a510,000\u201315,000<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related Services<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/en\/services\/allergies\/\">Allergy Treatment at Tokyo Hub Clinic<\/a><\/li>\n\n\n<li><a href=\"\/en\/services\/general-practice\/\">General Practice<\/a><\/li>\n\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>If you&#8217;ve recently moved to Japan and suddenly find yourself sneezing, congested, and rubbing itchy eyes every spring, you&#8217;re not imagining things. Japan has one of the highest rates of hay fever (kafunsho \/ \u82b1\u7c89\u75c7) in the world, affecting an estimated 40\u201350% of the population. And if you&#8217;ve never had allergies before, that doesn&#8217;t make [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-255","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/posts\/255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/comments?post=255"}],"version-history":[{"count":3,"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/posts\/255\/revisions"}],"predecessor-version":[{"id":483,"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/posts\/255\/revisions\/483"}],"wp:attachment":[{"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/media?parent=255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/categories?post=255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hub-clinic.tokyo\/en\/wp-json\/wp\/v2\/tags?post=255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}