Influencer endorsement and word-of-mouth
Multiple reviewers cite popular influencers (Suica, KAYO) and friend recommendations as drivers for initial purchase, with many noting they were 'excited' before first use based on positive online visibility.
Complementary pairing with ROOTON shampoo
Many buyers purchased the treatment specifically to use alongside ROOTON's shampoo after hearing the combination yields superior results; synergy between products is frequently mentioned.
Sample trial and conversion
Customers report receiving samples in advent calendars or promotional bundles, and several explicitly state the positive sample experience drove full-size purchase.
Restock and loyalty
High repeat-purchase language ('リピート,' 'second bottle,' 'continue to purchase') indicates established users returning for refills rather than trying it for the first time.
Sensitive scalp/skin needs
Some buyers specifically seek this product for scalp sensitivity, post-partum hair loss concerns, or incompatibility with other brands (e.g., L'Oréal causing reactions).