

Jamsil Indoor Gymnasium
Jamsil Indoor Gymnasium is one of Seoul's most durable mid-size event rooms, operating inside the Jamsil Sports Complex in Songpa with an official seating count of 11,044 and a maximum stated capacity of 20,000 depending on setup. Opened in 1979 and managed through Seoul's sports-facilities system, the venue has stayed useful because it can move between pro sports, public events, and concert-scale productions without needing full arena economics.
The official facility guide frames it as a multi-purpose hall for basketball, volleyball, handball, international meetings, concerts, and large corporate events. It also remains the home court of the Seoul Samsung Thunders, which keeps the building active beyond the live-music calendar. For K-pop, that flexibility is the point: Jamsil Indoor Gymnasium is large enough to carry meaningful demand, but still intimate enough for fan-cons, residency-style runs, and one-off shows that do not need the full Olympic-stadium leap.
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