肌研极润保湿化妆水，170毫升

Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.

We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.

The number of hyaluronic acid types and the texture. This original Gokujyun has four types in a fifteen-ingredient formula with a light, slightly viscous feel. Gokujyun Premium has eight types plus sacran, a polysaccharide from Japanese freshwater algae, and hydroxyethyl urea, which makes it thicker and better suited to very dry skin. If your skin is normal to combination, or you would rather avoid urea, the original is the better fit.

Not necessarily. Rohto sells a separate Hada Labo Tokyo range in the US with its own formulations, so a US bottle can carry a different ingredient list from the Japanese domestic one. What is listed on this page is the Japanese domestic formula, and the full ingredient list is published here so you can compare it directly against whatever else you are looking at.

Same formula, different bottle. The 170ml is the standard size and travels more easily. The 400ml pump costs less per millilitre and is easier to use one-handed, but it is not designed to be refilled. If you already know the formula suits you, the pump is the more economical choice.

In Japan the category is called keshousui, which sits between the two. It goes on straight after cleansing like a Western toner, but it does not exfoliate or remove residue, and the texture is thicker and more viscous than most Western toners. Treat it as your first hydrating layer rather than a cleansing step.