What 'Quasi-Drug' Means on a Japanese Sunscreen
Decoding the regulatory label on your J-beauty favorite.
Japan regulates sunscreens with UV-protection claims as 'quasi-drugs' (医薬部外品) under the MHLW, a category that sits between ordinary cosmetics and pharmaceuticals.
Because quasi-drug status means the active filters and their permitted levels are reviewed before sale, the label signals a defined regulatory pathway rather than a guarantee that one product outperforms another.
Questions we get a lot
What does PA++++ mean on a sunscreen?
PA is the 'Protection Grade of UVA,' a rating developed in Japan and used across Asia, based on the Persistent Pigment Darkening (PPD) test. It runs from PA+ (some UVA protection) to PA++++ (extremely high). It complements SPF, which reflects only UVB protection.
What is a 'quasi-drug' in Japan?
A quasi-drug (医薬部外品) is a Japanese regulatory category between ordinary cosmetics and pharmaceuticals, overseen by the Ministry of Health, Labour and Welfare (MHLW). Sunscreens making a UV-protection claim fall here, so their active UV filters and permitted concentrations are reviewed before the product can be marketed.
Does 'quasi-drug' mean a Japanese sunscreen is better?
Not by itself. Quasi-drug status means the formula's active filters cleared a defined MHLW pathway, which is a quality and consistency signal — but real-world protection still depends on the filter system, applying enough, and reapplying. An elegant formula used sparingly underperforms a basic one used well.
r/JapaneseBeauty: 'My Japanese sunscreen says 医薬部外品 / quasi-drug — is that better than a regular cosmetic SPF?'