What Is Chodong? K-pop First-Week Album Sales, Explained
A few days after any major comeback, the same kind of headline shows up: [group] sells 1.2 million copies in first week. If you’ve just started following K-pop, that number arrives without explanation — where it comes from, who counts it, and why two articles about the same album sometimes quote two different figures.
The Korean word for it is chodong (초동), and it’s one of the few pieces of industry vocabulary that fandoms use constantly without ever defining.
What the number actually counts
Chodong literally means something closer to “initial movement.” In practice it means album sales in the first seven days from release — a fixed window that opens on release day and closes a week later. It is not the album’s lifetime total, and it doesn’t keep growing. Once the week is up, that album’s chodong is finished, permanently. Hanteo treats it as a category in its own right, keeping a standing hall of fame of the biggest opening weeks.
That fixed window is the whole point. Total sales take months to settle and keep moving, which makes them useless for the thing fandoms actually want to measure: how many people showed up immediately. A group that sells 800,000 copies in seven days has a different kind of fanbase than one that reaches the same total over a year, and chodong is the number that separates the two.
It also explains a piece of fan behavior that looks strange from outside: why fandoms push each other to buy on release day instead of whenever it happens to be convenient. Buying in week two still supports the artist, but it doesn’t touch the number everyone is watching.
Why you’ll see two different figures
Here’s the part that confuses people: the same album routinely has two “first week” numbers in circulation, and neither is wrong.
Hanteo counts sales as they happen. Its data comes in automatically from more than 1,200 certified K-pop album stores in Korea and abroad, updating in real time — which is why fans can watch a number climb hour by hour on release day. The catch is that a store has to be Hanteo-certified to be counted at all.
Circle Chart — the national chart run under the Korea Music Content Association, rebranded from Gaon in July 2022 — works the other way. It counts albums shipped out by labels and distributors, regardless of which store they went to.
So one is measuring copies leaving a cash register, the other copies leaving a warehouse. They’re answering slightly different questions, and the two figures for a given album are essentially never identical. When you see a record being claimed, it’s worth checking which chart it’s on — comparing a Hanteo number against a Circle number is comparing two different measurements.
What inflates it
Chodong is a real signal, but it’s a purchasable one, and the industry knows it.
Most releases ship in multiple album versions with different photobooks and randomized photocards, and collectors buying three versions of one album register as three sales. Fansign entries work the same way — many are allocated by lottery weighted to how many copies you bought, so a single fan can account for dozens of units.
None of that is fraud, and none of it is hidden. It does mean chodong measures spending intensity as much as headcount — worth remembering before you read the number as a count of people.
What it actually decides
Beyond bragging rights, physical sales feed directly into the weekly music show scoring formulas alongside streaming, downloads, and broadcast points. A big first week lands right inside the promotion window where those trophies are decided, so chodong and the trophy race are the same event viewed from two angles.
That’s also why release timing matters so much to fandoms, and why a comeback is planned as a campaign rather than a date. The calendar shows you the day the clock starts.
Reading the number sensibly
Three habits keep you out of trouble:
Check which chart. A Hanteo figure and a Circle figure aren’t interchangeable, and record claims that don’t name the source usually don’t survive checking.
Don’t read one week as a whole career. Chodong measures the first seven days of a single release. Groups with enormous chodong can have modest streaming numbers, and groups whose songs live for years on playlists can post unremarkable first weeks. Both are normal.
Don’t compare across eras. The K-pop physical album market has changed enormously in a decade, and a number that would have been extraordinary once can be ordinary now. Comparisons are only meaningful between releases close together in time.
If you want to see chodong in the wild, our breakdown of aespa’s Armageddon walks through one of the Hanteo milestones the group has hit — with the sourcing shown, so you can see exactly which chart the claim belongs to.