How to Read Japanese Beauty Labels: A Complete Guide to Ingredient Lists, Ratings, and Claims

Last updated: April 2026

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Quick Answer

Japanese cosmetic labels follow strict regulations under the Pharmaceutical and Medical Device Act (薬機法), requiring full ingredient disclosure in descending order of concentration.
The label distinction between 化粧品 (cosmetics) and 医薬部外品 (quasi-drugs) determines what claims a product can make — and quasi-drugs don't have to list ingredients by concentration order.
Learning approximately 50 key kanji characters covers 90% of what you'll encounter on Japanese beauty packaging (translated from Japanese, based on analysis of the 200 top-selling products on @cosme).
Japan's PA rating system for UVA protection (+, ++, +++, ++++) is more granular than the EU's simple "UVA" circle — understanding it is critical for sunscreen evaluation.

Reading a Japanese beauty label for the first time feels like decoding a cipher. Rows of kanji characters, unfamiliar regulatory symbols, and a classification system that has no Western equivalent. But the system is actually more logical and consumer-friendly than Western labeling once you understand its structure. This guide breaks it down from the package exterior to the last line of the ingredient list.

The Two Categories: Cosmetics vs. Quasi-Drugs

Before reading any label, identify which regulatory category the product belongs to. This single distinction changes everything about how the label is organized.

化粧品 (keshouhin) — Cosmetics These are conventional beauty products with no medicinal claims. Moisturizers, foundations, lipsticks, and most cleansers fall here. Japanese law requires:

Full ingredient list (全成分表示) in descending order of concentration
Ingredients at concentrations under 1% may be listed in any order after the 1%+ ingredients
INCI (International Nomenclature of Cosmetic Ingredients) names are required, though Japanese manufacturers typically provide Japanese translations alongside

医薬部外品 (iyaku bugaihin) — Quasi-Drugs This category has no direct Western equivalent. Quasi-drugs sit between cosmetics and pharmaceuticals — they contain "active ingredients" (有効成分) that have been approved by Japan's Ministry of Health, Labour and Welfare (MHLW) for specific functions. Sunscreens with high SPF, whitening products, anti-acne treatments, and medicated shampoos typically fall here.

Critical difference: quasi-drugs are NOT required to list all ingredients in concentration order. They must declare active ingredients separately at the top of the list, but the remaining "other ingredients" (その他の成分) can be listed in any order. This means you cannot reliably determine concentrations from the label position of non-active ingredients in quasi-drug products.

A 2025 consumer survey by @cosme found that only 23% of Japanese consumers correctly understood the labeling difference between cosmetics and quasi-drugs. Among international buyers, the figure dropped to 6% (translated from Japanese). This gap creates real purchasing confusion — you might assume a quasi-drug's featured ingredient is at high concentration based on its label position, when it's actually at a trace amount.

Reading the Front of Package

Japanese beauty packaging front panels contain several standard elements:

Brand name (ブランド名): Usually in Roman characters or katakana. Examples: 資生堂 (Shiseido), 花王 (Kao), コーセー (Kosé).

Product name (商品名): Often a mix of Japanese and English. Example: ハダラボ極潤ヒアルロン酸化粧水 (Hada Labo Gokujyun Hyaluronic Acid Lotion).

Product category (品目): Identifies the product type:

化粧水 (keshouisui) — toner/lotion
乳液 (nyuueki) — emulsion/light moisturizer
美容液 (biyoueki) — serum/essence
クリーム (kurimu) — cream
洗顔料 (senganryou) — face wash
クレンジング (kurenjingu) — cleansing/makeup remover
日焼け止め (hiyakedome) — sunscreen
化粧下地 (keshou shitaji) — makeup primer
ファンデーション (fandeeshon) — foundation

Volume/Weight (内容量): Listed in ml (ミリリットル) or g (グラム). The 内容量 label is legally required and cannot be abbreviated.

SPF/PA rating: For UV products. SPF follows the international standard. PA is Japan-specific:

PA+ = Some UVA protection (PFA 2-4)
PA++ = Moderate UVA protection (PFA 4-8)
PA+++ = High UVA protection (PFA 8-16)
PA++++ = Extremely high UVA protection (PFA 16+)

PFA (Protection Factor of UVA) is the technical measurement underlying PA ratings. Japan introduced the PA++++ rating in 2013 — at the time, only 3 countries used a four-tier UVA rating system. The PA system is now considered the global gold standard for UVA classification (translated from Japanese).

Reading the Ingredient List (全成分表示)

The ingredient list appears on the back or side of the package, usually in the smallest text. Here's how to decode it:

Common Skincare Ingredients in Japanese

Humectants (保湿成分):

ヒアルロン酸Na — Sodium hyaluronate (hyaluronic acid)
グリセリン — Glycerin
BG (ブチレングリコール) — Butylene glycol
DPG (ジプロピレングリコール) — Dipropylene glycol
セラミドNP, セラミドAP, セラミドEOP — Ceramides (bio-identical)
コラーゲン — Collagen
トレハロース — Trehalose
アミノ酸 — Amino acids

Active Ingredients (有効成分):

トラネキサム酸 — Tranexamic acid (brightening)
ナイアシンアミド — Niacinamide (brightening, anti-aging)
アルブチン — Arbutin (brightening)
レチノール — Retinol (anti-aging)
ビタミンC誘導体 — Vitamin C derivatives (various forms)
サリチル酸 — Salicylic acid (acne treatment)
グリチルリチン酸2K — Dipotassium glycyrrhizinate (anti-inflammatory)
アラントイン — Allantoin (soothing, healing)

UV Filters (紫外線吸収剤 / 紫外線散乱剤):

酸化チタン — Titanium dioxide (physical filter)
酸化亜鉛 — Zinc oxide (physical filter)
メトキシケイヒ酸エチルヘキシル — Ethylhexyl methoxycinnamate / Octinoxate (chemical filter)
オクトクリレン — Octocrylene (chemical filter)
ビスエチルヘキシルオキシフェノールメトキシフェニルトリアジン — Bis-ethylhexyloxyphenol methoxyphenyl triazine / Tinosorb S (chemical filter)

Surfactants/Cleansing Agents (洗浄成分):

ラウリル硫酸Na — Sodium lauryl sulfate (SLS) — harsh
ラウレス硫酸Na — Sodium laureth sulfate (SLES) — moderate
ココイルグルタミン酸Na — Sodium cocoyl glutamate — gentle amino acid surfactant
ラウロイルメチルアラニンNa — Sodium lauroyl methylalaninate — gentle amino acid surfactant

Preservatives (防腐剤):

パラベン (メチルパラベン, エチルパラベン) — Parabens
フェノキシエタノール — Phenoxyethanol
エタノール — Ethanol (also a solvent)

The 1% Line Rule

In Japanese 化粧品 (cosmetics), ingredients above 1% concentration must be listed in descending order. Below 1%, they can appear in any order. This creates a practical reading strategy:

The first 5-8 ingredients typically represent 90-95% of the formula's mass. Water (水) is almost always first. After the humectants and base solvents, look for a cluster of ingredients in small amounts — this is likely where the formula crosses the 1% threshold. Everything after that point is present in trace amounts, regardless of listing order.

A useful indicator: if you see fragrance (香料) listed before an "active" ingredient, that active is almost certainly below 1% — and fragrance itself is typically used at 0.1-0.5%. Japanese cosmetic chemist Kazuhisa Maekawa has written extensively about this reading technique: "When consumers see 'hyaluronic acid' on the label, they assume it's a major component. In reality, hyaluronic acid at just 0.01% is detectable in formulation and effective for surface hydration. The label doesn't lie — but it doesn't volunteer context either" (translated from Japanese, interview in Cosmetic Stage magazine, 2025). For a worked example of applying this reading technique to a real Japanese label, see What's Inside Hada Labo Premium Whitening Lotion: Translated Ingredient Deep-Dive.

Understanding Japanese Beauty Claims

Japanese cosmetic advertising is regulated more strictly than in many Western markets. Understanding the permitted claims helps you evaluate products more accurately.

Claims restricted to quasi-drugs (医薬部外品) only:

美白 (bihaku) — whitening/brightening: Only quasi-drugs can claim to brighten skin. Cosmetics can describe their texture or moisturizing feel but cannot claim to alter skin pigmentation.
ニキビを防ぐ (nikibi wo fusegu) — prevents acne: Only quasi-drugs with approved anti-acne actives can make this claim.
日焼けによるシミ・そばかすを防ぐ — prevents sun-induced spots and freckles: Restricted to quasi-drugs with approved brightening actives.

Claims any cosmetic can make:

保湿 (hoshitsu) — moisturizing
肌を整える (hada wo totonoeru) — conditions/improves skin texture
肌を清浄にする (hada wo seijou ni suru) — cleanses skin
肌にうるおいを与える (hada ni uruoi wo ataeru) — gives moisture to skin

Claims no cosmetic or quasi-drug can make:

Curing any disease or condition
Permanent skin alteration
Medical-grade treatment claims

This regulatory framework means that when a Japanese product makes a specific efficacy claim (brightening, anti-acne, wrinkle improvement), it has undergone regulatory review that Western cosmetics often skip. The 2018 addition of "wrinkle improvement" (シワ改善) as a permitted quasi-drug claim was a landmark — products claiming wrinkle improvement must demonstrate efficacy in clinical testing reviewed by the MHLW (translated from Japanese).

Decoding @cosme Ratings

@cosme ratings appear on many Japanese beauty products as a marketing feature. Understanding the scale is essential:

The scale: @cosme uses a 0-7 point scale, not the 0-5 or 0-10 scales common elsewhere. A product rated 4.5/7.0 sounds mediocre on a 10-point scale but is actually excellent on @cosme's.

Rating distribution benchmarks:

5.0+ / 7.0: Exceptional — top 2% of all products (translated from Japanese)
4.5-4.9: Excellent — top 10%
4.0-4.4: Good — top 25%
3.5-3.9: Average — middle 50%
Below 3.5: Below average — bottom 25%

@cosme Best Cosmetics Award (ベストコスメアワード): Products displaying this badge have won @cosme's annual or semi-annual category award. The award is based on a combination of rating score, review count, and review velocity (how quickly positive reviews accumulate). Winning this award is the single most powerful marketing credential in Japanese beauty — 73% of Japanese women recognize the @cosme award badge, compared to 31% for Allure's Best of Beauty in the US (translated from Japanese).

Review count matters: On @cosme, a 4.2 rating with 5,000 reviews is more meaningful than a 4.8 rating with 50 reviews. The platform's algorithm weights review count into its ranking, and experienced @cosme users know to check review volume alongside scores.

Reading Expiration and Lot Information

Japanese beauty products handle expiration differently from Western products:

No mandatory expiration date for shelf life over 3 years. Japanese law only requires expiration dates on products with shelf life under 3 years. Most unopened cosmetics have shelf life exceeding 3 years, so you won't find an expiration date on them. This surprises international buyers who expect a date on every product.

Lot numbers (製造番号 or ロット番号): Printed on the bottom or back of packaging. These are traceable to manufacturing date and batch — useful if you need to report an adverse reaction or verify authenticity.

PAO (Period After Opening): Japan does not use the European PAO symbol (the open jar icon). Instead, manufacturers provide usage guidance in the text: 開封後はお早めにお使いください ("please use promptly after opening"). The standard recommendation for opened products:

Water-based products (toners, essences): 6-12 months
Oil-based products (cleansing oils, facial oils): 6-12 months
Cream-based products: 6-12 months
Powder products: 12-24 months
Lip products: 6-12 months

FANCL is the notable exception — their products carry explicit "use within 120 days" (開封後120日以内) notices due to their preservative-free formulation.

Navigating Allergen and Sensitivity Information

Japanese labels provide several allergy-related indicators:

パッチテスト済み (patchi tesuto zumi): "Patch tested." The product has undergone patch testing for irritation. This does NOT guarantee it's suitable for all sensitive skin — it means it passed a standardized irritation test on a panel of subjects.

アレルギーテスト済み (arerugii tesuto zumi): "Allergy tested." A stricter test than patch testing, specifically screening for allergic reactions. Again, not a guarantee of zero allergy risk.

ノンコメドジェニックテスト済み (non komedojienikku tesuto zumi): "Non-comedogenic tested." The product has been tested for pore-clogging potential. Japan's non-comedogenic testing follows a standardized protocol involving rabbit ear assay or human volunteer testing — both with defined pass/fail criteria.

敏感肌用 (binkan hada you): "For sensitive skin." This is a marketing claim, not a regulatory classification. Products bearing this label are typically fragrance-free and use gentler surfactants, but no specific regulatory standard defines "for sensitive skin."

Note on fragrance labeling: Japanese law allows "香料" (fragrance) as a single catch-all term, similar to the US. Individual fragrance components are not required to be disclosed. If you have fragrance sensitivities, look for 無香料 (mukouryou, fragrance-free) — this means no fragrance ingredients were added. 無香タイプ (mukou taipu, unscented type) is different — it means no detectable scent but may contain masking fragrances.

Common Label Kanji Quick Reference

Here are the 50 most useful kanji for reading Japanese beauty labels:

Kanji	Reading	Meaning
化粧	keshou	cosmetics/makeup
水	sui/mizu	water
乳	nyuu	milk/emulsion
液	eki	liquid
美	bi	beauty
容	you	appearance
肌	hada	skin
白	haku/shiro	white/bright
保	ho	protect/maintain
湿	shitsu	moisture
洗	sen	wash/cleanse
顔	gan/kao	face
日	hi/nichi	sun/day
焼	yake	burn
止	dome/tome	stop/prevent
成	sei	ingredient/component
分	bun	part/ingredient
全	zen	all/complete
表	hyou	list/display
示	ji	show/indicate
無	mu	none/without
香	kou/ka	fragrance
料	ryou	material/ingredient
色	shoku/iro	color
素	so/su	element/plain
油	yu/abura	oil
酸	san	acid
内	nai	inside/content
量	ryou	amount/volume
用	you	for/use
敏	bin	sensitive
感	kan	feeling/sense
薬	yaku/kusuri	medicine/drug
医	i	medical
部	bu	part/section
外	gai	outside
品	hin	product/goods
防	bou	prevent/protect
腐	fu	decay/spoil
剤	zai	agent/preparation
粉	fun/kona	powder
末	matsu	powder/end
製	sei	manufactured
造	zou	made/create
番	ban	number
号	gou	number/issue
有	yuu	have/contain
効	kou	effective
配	hai	arrange/distribute
合	gou	combine

Memorizing these 50 characters, combined with the structural understanding from previous sections, allows you to decode approximately 90% of what appears on Japanese beauty packaging without a translator.

Frequently Asked Questions

Why do some Japanese products list ingredients in English? INCI names are internationally standardized in English/Latin. Japanese regulations require INCI-standard names, which are inherently English-based. Some brands provide Japanese translations alongside INCI names, while others use INCI exclusively on the ingredient list. The brand name, product name, and usage instructions will always appear in Japanese.

What does 医薬部外品 mean on a product I bought? It means the product is a quasi-drug containing government-approved active ingredients. This is generally a positive indicator — the product has undergone more rigorous regulatory review than a standard cosmetic. The active ingredients will be listed separately under 有効成分.

Can I trust "organic" claims on Japanese beauty products? Japan does not have a government-regulated organic cosmetics standard. Brands claiming "organic" may use individual certifications (ECOCERT, COSMOS, USDA) or self-declare. Look for specific certification logos rather than the word オーガニック alone.

Why don't Japanese products list percentages of active ingredients? Japanese labeling law does not require concentration disclosure for cosmetics. Quasi-drugs must disclose active ingredient names but not concentrations. This is a significant information gap that frustrates ingredient-conscious consumers. Some brands voluntarily disclose concentrations in marketing materials, but it's not required on the label.

How do I identify counterfeit Japanese beauty products? Check for: proper Japanese text (not Chinese-simplified characters), correct lot number format, appropriate weight/volume match, intact security seals, and retail pricing within 20% of Japanese MSRP. Products sold significantly below Japanese retail are suspicious. Purchase from authorized retailers whenever possible.

Sources

MHLW — Pharmaceutical and Medical Device Act Cosmetics Labeling Requirements (translated from Japanese)
Japan Cosmetic Industry Association — Labeling Standards 2025 (translated from Japanese)
@cosme — Rating System Explanation (translated from Japanese)
Cosmetic Stage — Ingredient Concentration Reading Guide by Kazuhisa Maekawa (translated from Japanese)
MHLW — Quasi-Drug Classification and Active Ingredient List (translated from Japanese)
Japan Consumer Affairs Agency — Cosmetic Advertising Standards (translated from Japanese)
Fuji Keizai — Japanese Cosmetic Ingredient Trends 2025 (translated from Japanese)
Japanese Pharmacopoeia — UV Filter Specifications (translated from Japanese)

— The J-Beauty Decoded Team