Ingredient reputation (Houttuynia Cordata/dokudami)
Many buyers specifically sought out this ingredient for its calming properties, often citing it as their preferred soothing ingredient among 'all natural' lines.
High ranking on ingredient-review platforms (Hwahae)
Multiple reviewers mention buying it because it ranked #1 for sheet masks on Hwahae or was highlighted by beauty YouTubers/Instagram influencers as a top pick.
Single-sheet trial availability
Many Japanese reviewers highlight that Olive Young lets them buy just one sheet to trial before committing, lowering the barrier to first purchase.
Shipping cost/order-value adjustment
A large number of Japanese buyers purchase this mask specifically as a cheap filler item to reach free-shipping thresholds (送料対策/金額調整), indicating strong impulse/add-on purchase behavior.
Word of mouth and repurchase
Numerous reviews describe this as a long-standing 'holy grail' or 'insurance' mask they've repurchased for years, especially for use during skin flare-ups.