{"product_id":"megrhythm-goodnight-neck-steam-sheet-12pcs","title":"Kao Megrhythm Good Night Neck Warming Steam Sheet 12 Sheets – Japanese Relaxation","description":"\u003c!--\n=============================================================\nCORRECTED SHOPIFY PRODUCT LISTING — EN (v2 verified 2026-05-20)\n=============================================================\nTITLE: Megrhythm Goodnight Neck Sheet — Steam-Warming Therapy by Kao, 12 patches (Unscented)\nMETA TITLE (≤60): Megrhythm Goodnight Neck Sheet — Kao Japan 12 pcs\nMETA DESCRIPTION (140-155): Japanese steam-warming neck sheet for evening relaxation. ~30 min of gentle 40°C warmth by Kao Megrhythm. 12 patches per box. Ships from Kobe.\nURL HANDLE: megrhythm-goodnight-neck-sheet-12pcs\nVENDOR: Kao Megrhythm\nPRODUCT TYPE: Body Care\nTAGS: megrhythm, kao, goodnight neck sheet, sleep aid, neck relaxation, evening wellness, steam warming, japanese wellness, made in japan\n\nVERIFIED FROM: Kao official lineup + Rakuten24 product page (JAN 4901301348111)\n=============================================================\n--\u003e\n\n\u003cp\u003e\u003cstrong\u003eAuthentic Japanese steam-warming neck sheet by Kao Megrhythm — designed for evening relaxation after a long day. Gentle 40°C warmth for about 30 minutes, with the brand's signature moist \"steam\" effect. Unscented, 12 single-use patches per box.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWhat it is\u003c\/h2\u003e\n\n\u003cp\u003eMegrhythm Goodnight Neck Sheet (蒸気めぐる首もとシート グッドナイト) is one of Kao's quietest, most beloved Japanese self-care products. Walk into any pharmacy in Kobe and you'll see the recognizable navy-and-pink packaging stacked on the wellness shelves. This isn't a pain medication and it isn't a heating pad — it's a thoughtful, single-use, gently warming sheet designed to be worn on the back of the neck before bed.\u003c\/p\u003e\n\n\u003cp\u003eThe brand name on the box says it all: \u003cem\u003eGoodnight\u003c\/em\u003e. Kao positions this product not for active daytime use, but for that quiet half-hour at the end of the day when you want to release the day's tension before sleep.\u003c\/p\u003e\n\n\u003ch2\u003eHow it works\u003c\/h2\u003e\n\n\u003cp\u003eLike the rest of Kao's Megrhythm Steam line (including the popular Eye Mask), this neck sheet uses iron oxidation to generate gentle warmth. When you open the foil pouch, oxygen activates a fine balance of iron powder, activated carbon, salt, water, and vermiculite mineral. The reaction produces consistent warmth at around 40°C — the temperature of a comfortable bath — and the moisture inside the patch slowly releases as warm vapor through the breathable surface.\u003c\/p\u003e\n\n\u003cp\u003eThis is the \"steam\" in Megrhythm's signature \"steam-circulation\" (蒸気めぐる) line: gentle moist heat rather than dry warmth. Most users describe the feeling as similar to a warm wet towel against the back of the neck, but lasting consistently for about thirty minutes.\u003c\/p\u003e\n\n\u003ch2\u003eWhen Japanese customers use it\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHalf an hour before bed, as part of an evening wind-down ritual\u003c\/li\u003e\n  \u003cli\u003eAfter a long day at the computer\u003c\/li\u003e\n  \u003cli\u003eDuring cold-weather evenings when the neck feels tight\u003c\/li\u003e\n  \u003cli\u003eOn the train home from a tiring day\u003c\/li\u003e\n  \u003cli\u003eAs a quiet self-care moment after a long flight\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eImportant: this is not a pain treatment, and not a substitute for medical care. Kao positions it as a wellness product for evening relaxation — not for treating injuries, chronic pain, or active inflammation.\u003c\/p\u003e\n\n\u003ch2\u003eBenefits\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e~30 minutes of gentle 40°C warmth\u003c\/strong\u003e — the signature Megrhythm warmth profile, neither too cool nor too intense.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSteam effect\u003c\/strong\u003e — moist warmth that feels closer to a wet compress than dry heat.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-use, no preparation\u003c\/strong\u003e — open the pouch, peel, apply. The reaction starts on air contact within 60 seconds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiscreet at home\u003c\/strong\u003e — slim profile, sits unobtrusively on the back of the neck.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in Japan\u003c\/strong\u003e — manufactured at Kao's facilities, identical to what's sold in Japanese pharmacies and Yodobashi.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnscented variant\u003c\/strong\u003e — for those sensitive to fragrance (a lavender-scented version also exists; can be sourced on request).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to use\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpen the individual foil pouch\u003c\/strong\u003e. Heat activation begins immediately on air contact.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePeel the protective backing\u003c\/strong\u003e from the adhesive side of the patch.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApply to the back of the neck\u003c\/strong\u003e, centered over the area you want to warm. (For specific application guidance, follow the diagram on the inside of the box.)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWear for about 30 minutes\u003c\/strong\u003e as the patch warms up gradually, peaks, and then gently cools.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemove when warmth fades.\u003c\/strong\u003e Dispose after single use — each patch is designed for one application.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eRecommended use is 2–4 patches per week. One box of 12 lasts about a month of regular evening use.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's inside\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIron powder\u003c\/strong\u003e (鉄粉) — the heat source, oxidizes in air\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActivated carbon\u003c\/strong\u003e (活性炭) — regulates the reaction rate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSodium chloride\u003c\/strong\u003e (塩化ナトリウム) — catalyst\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater\u003c\/strong\u003e (水) — produces the warm steam effect\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVermiculite\u003c\/strong\u003e (バーミキュライト) — paces water release\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNon-woven fabric outer\u003c\/strong\u003e — soft and breathable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSkin-safe adhesive\u003c\/strong\u003e on one side\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe \"Unscented\" variant contains no added fragrance. (A \"Lavender Scent\" variant exists in the same lineup — fragrance allergen list available on request.)\u003c\/p\u003e\n\n\u003ch2\u003eCautions and contraindications\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStop immediately\u003c\/strong\u003e if you feel pain, abnormal sensation, or extreme heat.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSkin reactions:\u003c\/strong\u003e stop use if eczema, rash, persistent redness, or itching develops. Temporary redness from warmth is normal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdhesive placement:\u003c\/strong\u003e apply smoothly — the adhesive should not wrinkle or lift.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNever microwave or heat with water.\u003c\/strong\u003e The patch is designed for ambient-air activation only.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFire safety:\u003c\/strong\u003e keep the foil pouch away from electrical outlets — accidental contact can ignite.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e avoid direct sunlight, high temperatures, or heat sources (radiators, heaters). The foil pouch may bulge in storage but the product remains safe.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePregnancy:\u003c\/strong\u003e consult your doctor before regular use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChildren:\u003c\/strong\u003e not recommended for children under 12.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiabetes with peripheral neuropathy:\u003c\/strong\u003e consult your doctor — reduced skin sensation increases burn risk.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSkin sensitivity:\u003c\/strong\u003e patch-test on a small area first if you have known adhesive allergies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis is a wellness product. It does not treat, cure, or prevent any disease. If you have persistent pain, swelling, or other symptoms, consult a healthcare provider.\u003c\/p\u003e\n\n\u003ch2\u003eShipping \u0026amp; authenticity\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e🇯🇵 \u003cstrong\u003eDirect from Kobe, Japan\u003c\/strong\u003e — sourced through verified Japanese channels.\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eWorldwide tracked shipping\u003c\/strong\u003e — full tracking from Japan.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e100% Authentic\u003c\/strong\u003e — original Japanese-language packaging by Kao Corporation.\u003c\/li\u003e\n  \u003cli\u003e🛂 \u003cstrong\u003eCustoms:\u003c\/strong\u003e classified as a general consumer good (not pharmaceutical, not high-pressure gas, alcohol-free, non-flammable). Established import pathway to EU, UK, US, Canada, Australia.\u003c\/li\u003e\n  \u003cli\u003e✈️ \u003cstrong\u003eAir shipping:\u003c\/strong\u003e Kao officially declares this product non-hazardous for air freight.\u003c\/li\u003e\n  \u003cli\u003e💰 \u003cstrong\u003e30-day return policy\u003c\/strong\u003e on unopened packaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3\u003eHow long does the warmth last?\u003c\/h3\u003e\n\u003cp\u003eAbout 30 minutes — designed for one evening relaxation session before bed, not for full-day wear.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use it during the day?\u003c\/h3\u003e\n\u003cp\u003eYes, but the product is specifically named \"Goodnight\" because Kao positions it for evening use as part of a wind-down ritual. The warmth profile is gentle, not the more intense pain-relief warmth of medicated patches.\u003c\/p\u003e\n\n\u003ch3\u003eIs this for pain relief?\u003c\/h3\u003e\n\u003cp\u003eNo. This is a wellness product for relaxation, not a treatment for pain, injury, or inflammation. For active pain conditions, please consult a healthcare provider.\u003c\/p\u003e\n\n\u003ch3\u003eWill it work on the shoulders or lower back?\u003c\/h3\u003e\n\u003cp\u003eIt's specifically shaped for the back of the neck (首もと). For other areas, Kao makes dedicated variants — Steam Foot Sheets for tired legs, Steam Eye Masks for the eye area, and Carbonated Gel Packs for the head-and-neck area together. We can source these variants on request.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's the difference between this and the Megrhythm Eye Mask?\u003c\/h3\u003e\n\u003cp\u003eSame warming technology, different anatomy. The Eye Mask is shaped for the eye area in five scent variants. This Neck Sheet is shaped for the back of the neck and comes in unscented or lavender. Many customers buy both as part of an evening self-care routine.\u003c\/p\u003e\n\n\u003ch3\u003eWhy \"Goodnight\" in the name?\u003c\/h3\u003e\n\u003cp\u003eKao positions this product as part of pre-sleep preparation — a quiet warming ritual before lying down. The unscented variant is designed to be neutral enough not to interfere with bedtime; the lavender variant uses calming aromatherapy associations.\u003c\/p\u003e\n\n\u003ch3\u003eAre these the same patches sold in Japanese pharmacies?\u003c\/h3\u003e\n\u003cp\u003eYes — identical packaging, identical product, sourced through verified Japanese channels. Same JAN code (4901301348111) as Yodobashi, Sundrug, and Matsumoto Kiyoshi stock.\u003c\/p\u003e\n\n\u003ch3\u003eIs it safe to fall asleep with the patch on?\u003c\/h3\u003e\n\u003cp\u003eThe warmth fades after about 30 minutes, so the patch typically cools well before you fall asleep. If you do fall asleep with it on, there's no risk of burns since the heat is self-limiting. Remove it in the morning.\u003c\/p\u003e\n\n\u003ch2\u003eFrom Natalia, in Kobe\u003c\/h2\u003e\n\n\u003cp\u003eI've recommended Megrhythm Goodnight to friends visiting Kobe more times than I can count. It's one of those Japanese products that doesn't really have a Western equivalent — the combination of gentle moist warmth, a 30-minute duration that matches an evening wind-down, and the discreet under-clothing fit just isn't replicated by any heating pad or rice sock I've tried.\u003c\/p\u003e\n\n\u003cp\u003eIf you're looking for a way to mark the end of a long workday — that small, intentional shift from \"still working\" to \"rest\" — this is the product Japanese pharmacy workers have been quietly buying for themselves for years.\u003c\/p\u003e\n\n\u003cp\u003eFor broader Japanese wellness context, see our blog on \u003ca href=\"https:\/\/tsujimotomarket.com\/blogs\/product-reviews\/japanese-pain-patches-guide\"\u003eJapanese Pain Patches Guide\u003c\/a\u003e — note that this Goodnight Neck Sheet is in the \"wellness\/relaxation\" category, distinct from the NSAID-class pain patches covered there.\u003c\/p\u003e","brand":"Kao Megrhythm","offers":[{"title":"Default Title","offer_id":47024218505391,"sku":null,"price":2800.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/7561\/5151\/files\/1_d7715277-872e-4b53-a53d-cc9c20f38adc.png?v=1782299117","url":"https:\/\/tsujimotomarket.com\/products\/megrhythm-goodnight-neck-steam-sheet-12pcs","provider":"Tsujimoto Market","version":"1.0","type":"link"}