How to Read Japanese Sunscreen: SPF, PA, Japan-Only Sizes and Refills

The most common mistake people make when buying Japanese sunscreen is treating SPF as a total score. SPF 50+ only tells you the bottle is strong against UVB, the band that reddens and burns skin. It says nothing at all about UVA, the half responsible for tanning, dark spots and the slow collapse of collagen. The Japan Cosmetic Industry Association (JCIA) splits this into two independent axes on its official UV glossary page: SPF covers UVB, PA covers UVA, and neither substitutes for the other. If you are buying Japanese sunscreen cross-border and only look at the SPF number, you have read half the label.

TL;DR: If you only want the verdict - for commuting and desk days, pick the Bioré Aqua Rich Watery Essence 100g, an Amazon.co.jp exclusive size, which showed roughly EUR 6.68 at crawl time. For long outdoor sessions or the beach, step up to the Anessa Perfect UV Skincare Milk NA 60mL, which Amazon.co.jp lists bundled with the UV spray, a milk texture with a waterproof claim; that page returned no parseable price at crawl time. If you dislike white cast but want volume, the ALLIE Chrono Beauty Gel UV EX 90g showed roughly EUR 11.80. All three figures are crawl-time readings from this session, not Japanese domestic pricing - switch your delivery destination on the product page to see the real JPY amount.

SPF and PA measure two different things, and neither converts into the other

The JCIA definition is blunt about it. SPF, short for Sun Protection Factor, mainly expresses protection against sunburn caused by UVB; the higher the number, the stronger the effect. But when the measured value is significantly above 50, it is labelled simply "SPF50+" rather than a larger number. PA, short for Protection Grade of UVA, measures protection against the persistent immediate darkening reaction that UVA triggers. It is expressed as PA+, PA++, PA+++ or PA++++, and more plus signs means stronger UVA defence.

Put plainly: SPF answers "how long until I burn", PA answers "how long until I tan". A bottle labelled SPF50+ with no PA rating tells you nothing you can use about UVA, and the reverse holds too. The scale was built out after JCIA published its UVA protection testing standard in 1996 and was extended to four grades from 2013. PA++++ corresponds to a PPD (Persistent Pigment Darkening) value of at least 16 - and that is a floor, not a precise score, so two bottles both reading PA++++ are not necessarily identical in UVA strength.

The method here is the same one that applies to hardware specs: establish what a number actually measures before arguing about its size. That is the order used in How to Read CPU Cooler Specs: What TDP, dB(A), mmH2O and RPM Actually Measure and in the earlier Amazon.co.jp table tennis blade guide.

The same JCIA page gives two more readings that get ignored. One is UV water resistance, expressed as one or two stars, which tells you how much protection survives after you get wet; check that for beach and pool days rather than the word "waterproof". The other is the split between UV absorbers and UV scattering agents: the former are chemical filters that absorb UV (such as ethylhexyl methoxycinnamate), the latter are powders like zinc oxide and titanium dioxide that scatter it. Scattering formulas usually leave more white cast but tend to suit sensitive skin better.

US Broad Spectrum and Japanese PA are not the same ruler

A lot of people read "Broad Spectrum" on one bottle and try to line it up against "PA++++" on another. That step is wrong. The FDA's 2011 sunscreen final rule sets a pass or fail threshold: under the in vitro test in 21 CFR 201.327(j), a product may carry "Broad Spectrum" on the front label only if its critical wavelength - the wavelength at which the area under the absorbance curve reaches 90 percent of the total area in the UV region - is at least 370 nm. The FDA's own Q&A page states you must "demonstrate that your drug product has a critical wavelength of at least 370 nm", and the 2011 final rule says outright that "there is no longer a need for a separate UVA rating". The US system deliberately refuses to publish a graded UVA number.

Europe takes a third route: the prevailing Cosmetics Europe approach requires the UVA protection factor to be at least one third of the labelled SPF, and qualifying products carry the UVA circle logo.

So the three systems line up like this. Japanese PA gives a four-step grade, where PA++++ means a PPD of at least 16. US Broad Spectrum gives a boolean, pass or fail at 370 nm. The European UVA circle gives a ratio threshold, at least one third of the SPF. There is no official conversion table between them. Seeing PA++++ on Amazon.co.jp does not let you conclude it is some multiple stronger than a Broad Spectrum bottle; it only tells you UVA is blocked to the PPD 16 tier.

Why the bottle on Amazon.co.jp is not the bottle in your hands

This is the layer worth digging into on Amazon.co.jp: for the same product line, the size listed there is often not the size you find on domestic e-commerce or through a shopping agent. The clearest case is the Bioré Aqua Rich line, where Amazon.co.jp carries two 100g bottles explicitly marked as Amazon.co.jp exclusives - the Aqua Rich Watery Essence 100g and the Aqua Rich Light Up Essence 100g, showing roughly EUR 6.68 and EUR 6.96 at crawl time. An exclusive size does not change the formula, but it does mean you cannot compare against the price of the 50g version sold elsewhere - price per gram is the only comparable unit.

There is also a genuine labelling conflict here. That Watery Essence listing carries "SPF50" in its title, with no plus sign, while the specification area of the same page shows "PA++++". Two positions on one page disagreeing is common on Amazon.co.jp where first-party and third-party listings are interleaved. The correct response is not to pick one and believe it, but to trust the physical packaging and check the bottle when it arrives.

Anessa makes the same point more sharply. Search for the Perfect UV Skincare Milk in 60mL and the top results on Amazon.co.jp are nearly all bundles - a set buy pairing the 60mL milk with the UV spray, a travel set with 20mL plus 60mL, even a five-pack of the 60mL. That last one returned a price field of EUR 680 at crawl time, clearly an outlier, probably a multi-unit total or a third-party quote, so this article does not cite it. If you want a single bottle, pay more attention to words like "set buy" or "x 5" in the title than to the capacity number.

Refill pouches are where Amazon.co.jp pricing actually splits

Japanese sunscreen has a product form you rarely see elsewhere: the refill pouch, labelled つけかえ用 or 詰替用. It ships without the bottle or pump - just the contents in a bag. Bioré sells the Aqua Rich Watery Essence Fresh Pouch 120g refill, roughly EUR 6.33 at crawl time, and also a two-piece set of a 120g bottle plus a 120g refill, roughly EUR 13.21, with the page describing a total of 240g. Muji's Sunscreen Gel refill in 120mL was around EUR 5.62, and its listing states Japan as the country of origin and publishes the full ingredient list.

The hidden cost of refills needs to be counted up front: they usually ship without a bottle or pump. On your first purchase you must buy the main bottle too, or you will be holding a bag of liquid with nothing to put it in. If you have no bottle yet, the bundle is usually less hassle than buying the bottle and the refill separately.

Pump bottles are the other route to volume. The NIVEA UV Water Gel EX pump in 270g was around EUR 9.71 at crawl time, which looks better per gram than the same brand's UV Deep Protect & Care Gel in 80g at around EUR 4.50. But a pump has a wide opening, makes single doses hard to control, and exposes more surface to air once opened. If you are not applying it head to toe every day, 270g will likely still be sitting there a year later.

Milk, gel, essence, cream: how to read the texture categories

These four words are not marketing noise. They are literal descriptions of the formulation, and they decide how the product feels and where it belongs.

Milk (ミルク) has medium flow and a noticeable film, and is usually the strongest against water and sweat. The Anessa gold bottle, the Perfect UV Skincare Milk NA 60mL, is exactly this, with "waterproof" and "makeup base" written into the title. The trade-off is that it needs a proper cleanser; regular face wash will not remove it.

Gel (ジェル) is high in water content and melts as you spread it, which suits large areas of body. The ALLIE Chrono Beauty Gel UV EX 90g is the representative here, and the same line has a 40g mini, around EUR 6.50, for reapplying on the go.

Essence (エッセンス) is the thinnest and most watery, and it is what Japanese buyers reach for on ordinary commuting days. The Bioré Aqua Rich line sits here, as does the NIVEA UV Deep Protect & Care Essence 50g at around EUR 4.64. Thin means the film is thin, so long outdoor stretches need more frequent reapplication.

Cream (クリーム) is the heaviest, and usually targets dry skin or people who want a non-chemical formula that relies on scattering agents instead of absorbers. Bioré offers the Aqua Rich Watery Hold Cream 50g, listed as a non-chemical formula, around EUR 6.43, and the Aqua Rich Airy Hold Cream 70g, around EUR 7.16. Non-chemical does not mean non-irritating; it only says which type of filter is used.

One more thing worth internalising: UVA intensity is far more constant through the day than UVB. It passes through cloud and through window glass, while UVB is largely blocked by glass. That explains a common confusion - you sit by a window, feel no heat, never redden, and yet the dark spots accumulate over a year. "I do not go outside, so I do not need sunscreen" does not hold up on the UVA axis.

Why there is no expiry date on the bottle

This is the detail most likely to make people suspect a counterfeit. Under Japan's PMD Act labelling requirements, only products that may deteriorate within three years under proper storage conditions need to display an expiry date; ordinary cosmetics stable for more than three years may omit it. A comparison of cosmetics shelf-life labelling rules published by China Food and Drug Administration media states the same rule: products with a shelf life under three years must mark the use-by date by year and month, while those over three years need not.

So what you usually find on a Japanese bottle is a batch code or manufacturing number, not an expiry date. No expiry date does not mean indefinite storage - it only means the manufacturer commits to three years or more based on stability data. In practice, finish a bottle within a year of opening, and photograph the batch code so you have a record.

Decision tree: match the bottle to the day

Work through this order rather than shopping by brand. The first branch asks whether you will be in water or sweating heavily today. If yes, look for two-star UV water resistance plus a waterproof claim, choose a milk texture, and go with something in the Anessa Perfect UV Skincare Milk NA 60mL class, accepting the added cost of having to cleanse it off properly.

If no, move to the second branch: how large is the area you apply to each day. Full body, go gel or a large pump bottle, and compare price per gram between the ALLIE Gel UV EX 90g and the NIVEA 270g pump before looking at the total.

Face and neck only, move to the third branch: do you mind white cast and pilling. If you do mind, take an essence texture such as the Aqua Rich Watery Essence 100g Amazon.co.jp exclusive. If you do not mind, or you have dry sensitive skin, take a cream, and consider the non-chemical Watery Hold version.

There is also a fallback rule. If you only want to test the formula first, do not start with the largest size. Buy a mid-size option like the ALLIE 40g mini or the Bioré 100g exclusive, confirm you can live with the texture and the scent, then come back for the 240g bottle plus refill set. That order avoids the most common waste of all: stockpiling a large bottle whose smell you cannot stand.

FAQ

How much difference is there between SPF50+ and a higher number?

On the UVB axis, less than the number suggests, and Japanese products stop publishing a higher number once they reach SPF50+ - JCIA's rationale is that an SPF around 50 is enough to prevent UVB inflammation even in strong sun or for photosensitive people, so anything measured significantly above 50 is written as SPF50+. What actually widens the gap is usually not the SPF number, but whether you applied enough and whether you reapplied on schedule.

Is PA++++ the same thing as US Broad Spectrum?

No, they have different dimensions. PA++++ is the top tier of the Japanese four-step scale and means a PPD of at least 16. US Broad Spectrum is a pass or fail determination under the FDA's 2011 final rule, with the bar set at a critical wavelength of at least 370 nm, and the FDA states explicitly that a separate UVA rating is not required. There is no official conversion between the two.

Why does the Amazon.co.jp price not match the yen price I have seen?

Every price in this article was crawled from the product page on 2026-10-22. This session's egress region is not Japan, so pages rendered in euros, which means these figures are not Japanese domestic yen pricing. Check the actual JPY amount, stock status and whether direct shipping is supported by switching the delivery destination in your own account. That is also why this article does not publish a yen price range - if it cannot be established, it does not get invented.

Can I use a refill pouch on its own?

Usually not. A つけかえ用 or 詰替用 pouch contains only the product, with no bottle or pump. On a first purchase, either buy the main bottle alongside it or choose the bottle plus refill set directly.

Sourcing limits and how to read the numbers

The definitions and grading here come from the Japan Cosmetic Industry Association's official UV glossary page; the US side comes from the FDA's official Q&A page and the text of the 2011 final rule; the Japanese labelling rule for shelf life comes from PMD Act requirements and publicly available compliance material. Each claim was cross-checked against at least two independent sources. On the product side, every ASIN was visited individually at amazon.co.jp/dp/ and written into this article only after a productTitle could be parsed from the page; anything that did not parse was left out. Brand sites such as shiseido.co.jp were reachable during this crawl, but individual product specification pages were not each verified, so this article cites no "official claimed SPF" figures and relies only on what the product pages actually display. Where a single page contradicts itself - as with the Bioré 100g listing that says SPF50 in the title and PA++++ in the specification area - that conflict is reported in the body rather than silently resolved in favour of one number.

Price basis: all prices are marked as crawl-time readings and are denominated in euros. They come from this session's product page crawls on 2026-10-22, do not represent Japanese domestic retail prices, and do not represent what you will be charged at checkout.

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