Every story, week by week.

A high star rating is the price of entry to Korea's best-seller chart, not the thing that wins it. Of the 98 rated products in Olive Young Korea's top 100 for 2026-W31, 96 score 4.5 or higher — and th

A founding note. Two questions kept coming back — from Americans about Korea, and from Koreans about America — and nobody was keeping the receipts. So we started.

Korea's best-seller chart is a bundling chart. Of the 100 products on Olive Young Korea's top-100 list for 2026-W31, 77 are sold as sets, multipacks or plus-offers — only 23 are a plain single item at

Korea's best-seller chart is concentrated and long-tailed at the same time. In the 2026-W31 top 100 at Olive Young Korea, one brand — MEDIHEAL — holds 8 slots including the #1 spot, and the ten bigges

We have said from the start that rankings can't be recovered retroactively. This week the payoff arrives: with two archived weeks, we can finally measure movement. Between W29 and W30, 16 products cli

We track 248 K-beauty brands across our live retail channels. Fourteen of them reach five channels or more — the proven, widely stocked tier. Eight of those fourteen appear on neither Sephora nor Ulta

We track 248 K-beauty brands across 18 live retail channels. Anua reaches 13 of them — the widest distribution on our board — followed by medicube at 12 and Dr. Althea at 11. But the top is thin: only

We read 173 posts across nine skincare subreddits this week and counted which K-beauty brands people actually name. The top of that list — Beauty of Joseon, medicube, SKIN1004 — is not a set of hidden

NielsenIQ reports that K-beauty reached 28.7% of U.S. households in 2025. In our frozen 2026-W30 sample, only one of Olive Young Korea's top 20 products also appeared in Olive Young Global's U.S. top

We ask four AI assistants the same 60 K-beauty questions each week and count which brands the answers name. Some brands the assistants recommend heavily are barely on a shelf: Dr.Jart+ is cited 25 tim

We track 15 channels as if they were 15 separate shelves. Two of them are not: YesStyle and Skin Cupid share 20 charting brands — 59% of the smaller shelf. If you are a brand deciding where to land, s

Anua reaches more retail channels than any brand we track — 11 of 15. But reach flattens a brand into one number, and Anua's actual position swings from #1 of 94 at Skin Cupid to #65 of 100 at Olive Y

Most ingredient gaps are a matter of degree. Three are absolute: this week, ampoule, barrier and mung bean each appear on five, four and two Korean top-100 products and on exactly zero US-facing ones.

"Available in nine channels" is the most quotable number in K-beauty distribution, and the most misleading one. Our channels are not equal-sized gates: the deepest sample we take is 195 rows, the shal

Korean trade press is covering K-beauty's arrival on the New York exchange — and, in the same breath, delisting pressure on marginal firms. Our shelf data explains why both are true at once: the categ

We track 221 K-beauty brands across 15 live retail channels. 148 of them — 67% — appear on exactly one. No brand reaches all 15; the widest reach belongs to Anua, at 11.

Two US prestige retailers, both selling K-beauty, both with a best-seller chart we archive weekly. Sephora carries 16 Korean brands on its chart this week. Ulta carries 17. The overlap is one brand.

Korean cosmetics exports rose 27% to a record $7.0 billion in the first half of 2026, with the US the single largest buyer at 20.7%. Our archive says the boom is narrower than the number suggests: of

The salmon-DNA ingredient is the fastest-heating signal on our radar this week: US search demand has multiplied 9x year over year, while PDRN products hold just 7 chart slots across the 15 retail chan