Costco

Costco (costco.com) is a major US membership warehouse club. It occasionally stocks Japanese beauty brands like SK-II at competitive bulk pricing, but availability is inconsistent and varies by location and season.

Costco has a 1.8 out of 5 rating on Trustpilot from approximately 2,813 reviews. Trustpilot scores for major retailers tend to skew low because satisfied customers rarely leave reviews on third party platforms. Costco is a well established US retailer with one of the most generous return policies in retail (almost unlimited returns on most items). For J beauty specifically, the main issue is inconsistent availability rather than authenticity concerns.

Shipping: Ships from US warehouses. Free shipping on most online beauty orders (membership required, $65/year for Gold Star). Standard delivery takes 3 to 7 business days.

Returns: Costco has an exceptionally generous return policy with no time limit on most items.

Authenticity: Costco sources products through authorized distribution channels. As a major retailer, counterfeit risk is minimal.

Sources: costco.com, Trustpilot (1.8/5, ~2813 reviews, March 2026)