Seodaemun Prison was built by the Japanese colonial government in 1908 and used to imprison and execute Korean independence activists throughout the occupation (1910–1945). Around 40,000 people passed through it; many were tortured, and some were killed here. The prison remained in use by successive Korean governments until 1987 — a fact the museum does not shy away from.
The main cell block, execution building, and solitary confinement cells have been preserved. Dioramas and animatronics in the basement recreate interrogation and torture scenes in considerable graphic detail — be prepared for that. The upper floors provide better historical context: the Korean independence movement, individual inmates, and the broader story of the occupation.
English signage is uneven — thorough on the upper floors, sparse in some of the preserved buildings. English-speaking guides are available and improve the experience significantly.
Admission is ¥3,000 (adults). Subway line 3 to Dongnimmun station, exit 5.