Remove Ma Dong-seok and 99 more: Korean Netflix still holds

Join every Korean film and series that has reached a Netflix Top 10 to the actors credited in it, and a shape appears that is hard to see from any one title.

666 titles. 1,391 actors. 3,579 casting slots. Draw a line between two titles whenever they share a credited actor, and the median title is connected to 16 others. 12.12: The Day is connected to 114. Only 15 titles — 2.3% — share nobody with anything else.

Follow those lines and 649 of the 666 titles, 97.4%, form a single connected body. There are 17 separate groups in total: one containing almost everything, and 15 titles sitting alone.

We assumed a few people were holding it together. They are not.

The obvious explanation is a small repertory of very busy actors. Ma Dong-seok appears in 21 of these titles, Hwang Jung-min in 20, Lee Byung-hun in 18, Sul Kyung-gu and Ha Jung-woo in 17 each. Thirty-eight actors appear in ten or more. Pull those people out and the whole thing should fall apart.

We tested it. It does not.

Remove the hundred busiest actors in Korean Netflix-charting film and television — one in fourteen of everyone in the set — and the remaining 613 titles are still 94.5% one connected body.

The median number of links does fall, from 16 to 7. Busy actors do a great deal of the connecting. They are simply not load-bearing: take them out and the structure stands on everyone else.

For comparison, removing the hundred least busy actors changes almost nothing, as you would expect: 649 of 665 titles, 97.6%.

Where the connection actually comes from

Half the actors in this set appear in exactly one title. 673 of 1,391 — 48.4%. Only 204 appear in five or more.

So the connectivity is not the work of a famous few. It is the accumulated effect of a very large number of people who did two or three of these, overlapping in different combinations. A production does not need to hire a star to be joined to the rest; it needs to hire almost anyone who has worked before.

Note that The Thieves reaches 69 titles on eleven recorded cast members while Pinocchio reaches 70 — one on eleven recorded cast members, the other on forty-three. How connected a title is has little to do with how large its cast is.

What would change this number

A link is one shared actor. That is deliberately weak. A single character actor with a scene in two unrelated films joins them here. The median-links figure is the honest companion to the 97.5%: it says the typical title is not hanging on by one thread but sitting in a mesh of sixteen.

Wikidata’s cast lists are incomplete, and they skew towards names someone thought worth writing down. That cuts both ways: the true number of links is higher than we measure, and the share of linking done by famous people is lower than it looks here.

277 titles have no cast recorded at all — 943 Korean titles are matched to Wikidata items and only 666 carry a P161 statement. Those 276 are not counted as isolated; they are absent.

Only Korean citizens are counted. International co-productions lose their non-Korean cast, and with them the links to everything else those people have been in.

And this is cast alone. Directors, writers, producers, studios and agencies are not in it. If the question is whether Korean screen output is made by an overlapping pool of people, cast is one answer, and almost certainly the most conservative one available.

---

What changed on 2 September 2026

We re-collected the cast data on 25 August 2026 and this piece now reports that count. The set moved from 668 titles to 666 and from 1,395 actors to 1,391, because Wikidata’s cast statements changed underneath us in both directions. Every figure above was recounted from the new file.

The finding did not change. Removing the hundred busiest actors still leaves 94.5% of the set in one connected body, where the earlier count said 94.6%. We are printing the old and new figures side by side rather than quietly swapping them, because a number that moves without saying so is a number no one should trust.

The body holds without its busiest people. It is built from pairs — and those barely repeat. Read how rarely two actors work together twice →

What changed on 3 September 2026

We re-collected the keyed title roster from Wikidata. One more charted title matched a Korean Wikidata item, and it has no cast recorded.

The join did not change. What grew is the roster it is measured against, so the gap we name here is one title wider than it was.