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Trackers› Clinical trials› Seoul
Clinical trial register · South Korea

Clinical Trials in Seoul, 2026

Every study on the ClinicalTrials.gov registry that lists a site in South Korea and is open, about to open, active-but-closed, or enrolling by invitation. Filter it, cite it, and take it away as a file.

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Source: ClinicalTrials.gov, U.S. National Library of Medicine. Complete coverage — all 3365 matching records held by the registry are in this view. Synced 11 Oct 2026, 03:17 UTC
3365
Studies in scope
all four open statuses
1831
Recruiting now
open to new participants
500
Lead sponsors
across recruiting studies
Top sites
Seoul 82 Busan 30 Daegu 24 Gyeonggi-do 22 Goyang-si 20
Narrow the registerReset
Recruitment status
Phase
Lead sponsor
AstraZeneca195 Seoul National University Hospital183 Yonsei University143 Samsung Medical Center142 Merck Sharp & Dohme LLC111 Clear sponsor filter
Site location
Seoul82 Busan30 Daegu24 Gyeonggi-do22 Goyang-si20
All 33 locations
Target enrolment
to

Trials with a site in Seoul

82 of 3365 studies
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Status
Study
Lead sponsor
Phase
Enrol
Sites in South Korea
Start
Recruiting
Janssen Research & Development, LLC
Phase 3
1,000
Seoul
2026-09-09
Recruiting
Janssen Research & Development, LLC
Phase 2
68
Buk Gu, Busan, Seoul
2026-07-28
Recruiting
Janssen Research & Development, LLC
Phase 3
700
Goyang-si, Gyeonggi-do, Hwasun, Seoul
2026-05-31
Recruiting
Janssen Research & Development, LLC
Phase 3
644
Busan, Daejeon, Gangnam Gu, Seoul
2026-05-23
Recruiting
Janssen Research & Development, LLC
Phase 3
460
Busan, Daejeon, Gangnam Gu, Seoul
2026-05-22
Recruiting
Janssen Research & Development, LLC
Phase 3
600
Busan, Gwangju, Gyeonggi-do, Seoul, Suwon
2026-03-05
Recruiting
Janssen Research & Development, LLC
Phase 1/2
60
Seoul
2026-03-03
Active, closed
Janssen Research & Development, LLC
Phase 2
168
Jeollanam-do, Seoul
2026-02-08
Recruiting
Janssen Research & Development, LLC
Phase 3
800
Goyang-si, Seoul
2025-12-19
Recruiting
Janssen Research & Development, LLC
Phase 3
500
Seoul
2025-12-03
Recruiting
Janssen Research & Development, LLC
Phase 1
360
Seoul
2025-10-10
Recruiting
Janssen Research & Development, LLC
Phase 2/3
1,092
Busan, Daegu, Daejeon, Dongdaemun-gu, Seongnam-si, Seoul, Suwon
2025-10-03
Recruiting
Janssen Research & Development, LLC
Phase 3
882
Busan, Daegu, Daejeon, Seoul, Suwon
2025-10-01
Recruiting
Janssen Research & Development, LLC
Phase 3
220
Cheongju-si, Gangnam Gu, Seongnam-si, Seoul
2025-09-10
Recruiting
Janssen Research & Development, LLC
Phase 3
1,203
Daejeon, Goyang-si, Hwasungun, Seoul
2025-09-02
Recruiting
Janssen Research & Development, LLC
Phase 1
400
Seoul
2025-07-15
Recruiting
Janssen Research & Development, LLC
Phase 3
600
Daejeon, Goyang-si, Gyeonggi-do, Seoul
2025-06-04
By invitation
A Rollover Study for Continued Study Treatment and Ongoing Safety Monitoring
NCT06788509Leukemia, Myeloid, Acute, Leukemia, Lymphocytic, Chronic, B-Cell, Lymphoma, Non-Hodgkin, Myelodysplastic Syndromes
DrugsJNJ-75348780·JNJ-87801493·JNJ-80948543·Ibrutinib
Janssen Research & Development, LLC
Phase 1
120
Seoul
2024-12-30
Active, closed
Janssen Research & Development, LLC
Phase 1
17
Seoul
2024-12-19
Recruiting
Janssen Research & Development, LLC
Phase 3
700
Daegu, Seoul
2024-12-12
Active, closed
Janssen Research & Development, LLC
Phase 3
655
Gwangju, Seongnam-si, Seoul, Suwon
2024-12-04
Recruiting
A Long-term Extension (LTE) Study of Guselkumab in Pediatric Participants
NCT06663332Crohns Disease, Colitis, Ulcerative, Arthritis, Psoriatic, Arthritis, Juvenile
DrugGuselkumab
Janssen Research & Development, LLC
Phase 3
196
Seoul
2024-10-29
Recruiting
Janssen Research & Development, LLC
Phase 3
1,000
Daegu, Seoul
2024-10-18
Recruiting
A Study of JNJ-89402638 for Metastatic Colorectal and Gastric Cancers
NCT06663319Colorectal Neoplasms, Gastrointestinal Neoplasms
DrugsFolfox·Bevacizumab
Janssen Research & Development, LLC
Phase 1
260
Seoul
2024-10-15
Recruiting
Janssen Research & Development, LLC
Phase 2
210
Seoul
2024-08-26
Active, closed
Janssen Research & Development, LLC
Phase 1
108
Seoul
2024-06-07
Active, closed
A Study of JNJ-88998377 for Relapsed/Refractory B-cell Non-Hodgkin's Lymphoma
NCT06470438Lymphoma, Non-Hodgkin, Refractory B-Cell NHL, Relapsed B-cell NHL
Janssen Research & Development, LLC
Phase 1
58
Seoul
2024-05-28
Recruiting
Janssen Research & Development, LLC
Phase 1/2
287
Seoul
2024-04-22
Recruiting
Janssen Research & Development, LLC
Phase 3
641
Chungcheongbuk Do, Gyeonggi-do, Jeollanam-do, Seoul
2024-04-18
Active, closed
Janssen Research & Development, LLC
Phase 3
272
Chungcheongbuk Do, Daegu, Gyeonggi-do, Jeollanam-do, Seoul, Yangsan
2024-04-09
Recruiting
Janssen Research & Development, LLC
Phase 3
120
Busan, Daegu, Seoul
2024-03-13
Active, closed
Janssen Research & Development, LLC
Phase 3
731
Ansan-si, Anyang-si, Bucheon-si, Gwangju, Seongnam, Seoul
2024-03-09
Active, closed
Janssen Research & Development, LLC
Phase 2
305
Cheongju-si, Incheon, Seoul
2024-02-16
Active, closed
Janssen Research & Development, LLC
Phase 3
838
Busan, Jeollanam-do, Seoul, Ulsan
2024-01-22
Active, closed
Janssen Research & Development, LLC
Phase 3
774
Busan, Seongnam-si, Seoul
2024-01-17
Active, closed
Janssen Research & Development, LLC
Phase 3
684
Ansan-si, Gwangju, Gyeonggi-do, Seoul
2023-10-12
Active, closed
Janssen Research & Development, LLC
Phase 3
311
Busan, Seongnam-si, Seoul
2023-10-12
Active, closed
Janssen Research & Development, LLC
Phase 1/2
71
Seoul
2023-05-18
Active, closed
Janssen Research & Development, LLC
Phase 2
68
Cheongju-si, Gyeonggi-do, Incheon, Jeollanam-do, Seongnam-si, Seoul
2023-05-18
Active, closed
Janssen Research & Development, LLC
Phase 3
1,135
Busan, Cheongju-si, Daegu, Gyeonggi-do, Jeollanam-do, Seoul
2023-03-23
Active, closed
Janssen Research & Development, LLC
Phase 3
213
Busan, Goyang-si, Hwasun, Seongnam, Seoul
2022-12-15
Active, closed
Janssen Research & Development, LLC
Phase 1/2
57
Cheongju-si, Goyang-si, Incheon, Jeollanam-do, Seongnam, Seoul
2022-12-13
Recruiting
Janssen Research & Development, LLC
Phase 2
520
Goyang-si, Seongnam-si, Seoul
2022-11-11
Recruiting
Janssen Research & Development, LLC
Phase 3
1,590
Busan, Daegu, Goyang-si, Hwasun, Incheon, Seoul
2022-10-25
Active, closed
Janssen Research & Development, LLC
Phase 3
864
Busan, Gyeonggi-do, Incheon, Jeollanam-do, Jeonju, Seoul
2022-10-13
Recruiting
Janssen Research & Development, LLC
Phase 2/3
201
Seoul
2022-09-23
Active, closed
Janssen Research & Development, LLC
Phase 2
577
Busan, Daegu, Gwangju, Gyeonggi-do, Hwaseong-si, Seoul, Suwon, Wŏnju
2022-09-19
Active, closed
Janssen Research & Development, LLC
Phase 3
418
Busan, Daegu, Goyang-si, Gwangju, Gyeonggi-do, Seoul, Suwon
2022-09-13
Active, closed
A Study of JNJ-90014496 in Participants With B-Cell Non-Hodgkin Lymphoma
NCT05421663Lymphoma, Non-Hodgkin, Lymphoma, B-Cell, Lymphoma, Large B-Cell, Diffuse
Janssen Research & Development, LLC
Phase 1/2
166
Seoul
2022-08-12
Active, closed
Janssen Research & Development, LLC
Phase 3
418
Gyeonggi-do, Gyeongsangnam-do, Jeollanam-do, Seongnam-si, Seoul
2022-08-05
Recruiting
Janssen Research & Development, LLC
Phase 1/2
225
Seoul
2022-07-29
Active, closed
Janssen Research & Development, LLC
Phase 2
703
Busan, Daegu, Goyang-si, Gwangju, Hwaseong-si, Seongnam-si, Seoul, Suwon
2022-07-22
Active, closed
Janssen Research & Development, LLC
Phase 2
36
Seoul, Suwon
2022-07-05
Active, closed
Janssen Research & Development, LLC
Phase 1/2
235
Goyang-si, Gwangju, Seoul
2022-04-11
Active, closed
Janssen Research & Development, LLC
Phase 3
350
Busan, Daegu, Daejeon, Dongdaemun-gu, Goyang-si, Gwangju, Gyeonggi-do, Seoul
2022-01-19
Active, closed
Janssen Research & Development, LLC
Phase 3
776
Gyeonggi-do, Gyeongsangnam-do, Seoul
2021-11-17
Active, closed
Janssen Research & Development, LLC
Phase 3
587
Daegu, Incheon, Jeollanam-do, Seoul
2021-10-14
Active, closed
Janssen Research & Development, LLC
Phase 3
743
Jeollanam-do, Seoul
2021-08-19
Recruiting
Janssen Research & Development, LLC
Phase 3
199
Busan, Daegu, Seoul
2021-07-15
Active, closed
Janssen Research & Development, LLC
Phase 3
1,054
Cheonan-si, Gwangju, Seoul, Suwon
2021-06-17
Recruiting
Janssen Research & Development, LLC
Phase 1/2
420
Seoul
2021-05-19
Recruiting
Janssen Research & Development, LLC
Phase 2
510
Jeollanam-do, Seoul
2021-02-01
Active, closed
Janssen Research & Development, LLC
Phase 2
220
Busan, Daegu, Goyang-si, Gwangju, Seoul, Yangsan
2020-12-18
Active, closed
Janssen Research & Development, LLC
Phase 1/2
228
Seoul
2020-12-15
Active, closed
Janssen Research & Development, LLC
Phase 3
518
Busan, Daegu, Gangnam Gu, Goyang-si, Hwasun-gun, Namdong, Seoul, Yangsan
2020-12-07
Active, closed
Janssen Research & Development, LLC
Phase 1
158
Cheongju-si, Seongnam-si, Seoul
2020-11-10
Active, closed
Janssen Research & Development, LLC
Phase 3
308
Busan, Gyeonggi-do, Gyeongsangnam-do, Jeollanam-do, Seongnam-si, Seoul
2020-10-13
Active, closed
Janssen Research & Development, LLC
Phase 3
1,074
Busan, Cheongju-si, Seongnam-si, Seoul
2020-09-30
Active, closed
Janssen Research & Development, LLC
Phase 3
696
Busan, Daegu, Daejeon, Gwangju, Gyeonggi-do, Seongnam-si, Seoul, Suwon
2020-09-23
Active, closed
Janssen Research & Development, LLC
Phase 3
419
Seoul
2020-06-12
Active, closed
Janssen Research & Development, LLC
Phase 2/3
1,064
Busan, Daegu, Gyeonggi-do, Incheon, Seongnam-si, Seoul, Suwon
2019-09-26
Active, closed
Janssen Research & Development, LLC
Phase 1
701
Seongnam-si, Seoul
2019-09-04
Active, closed
Janssen Research & Development, LLC
Phase 2/3
118
Daegu, Daejeon, Seoul
2019-08-15
Active, closed
Janssen Research & Development, LLC
Phase 3
2,517
Gwangju, Gyeonggi-do, Seoul
2019-06-11
Active, closed
Janssen Research & Development, LLC
Phase 3
765
Busan, Daegu, Daejeon, Gwangju, Gyeonggi-do, Seongnam-si, Seoul
2019-01-25
Active, closed
Janssen Research & Development, LLC
Phase 3
84
Daegu, Seoul
2018-10-29
Active, closed
Janssen Research & Development, LLC
Phase 2/3
1,409
Ansan-si, Busan, Daegu, Gyeonggi-do, Hwaseong-si, Seongnam, Seongnam-si, Seoul
2018-04-13
Active, closed
Janssen Research & Development, LLC
Phase 1/2
125
Daejeon, Gwangju, Gyeonggi-do, Seoul, Yangsan
2018-04-05
Active, closed
Janssen Research & Development, LLC
Phase 3
629
Busan, Daejeon, Goyang-si, Gwangju, Gyeonggi-do, Incheon, Seoul, Wŏnju
2018-03-23
Active, closed
Janssen Research & Development, LLC
Phase 1
751
Cheongju-si, Goyang-si, Incheon, Seongnam-si, Seoul
2016-05-24
Active, closed
Janssen Research & Development, LLC
Phase 2
239
Daejeon, Goyang-si, Incheon, Seoul
2015-04-22
Active, closed
A Long-term Extension Study of PCI-32765 (Ibrutinib)
NCT01804686Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma, Mantle Cell Lymphoma, Follicular Lymphoma
DrugIbrutinib
Janssen Research & Development, LLC
Phase 3
539
Goyang-si, Seoul
2013-09-09
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Cite this view

Priya Life Science (2026). Clinical trial register: studies with a South Korean investigative site, filtered. Derived from ClinicalTrials.gov. Retrieved 12 October 2026. https://priyalifescience.com/clinical-trials-south-korea/city/seoul

Query this register directly
GET /api/trials?country=in&status=recruiting&format=json Try it now →

About this register

This register is built from ClinicalTrials.gov, the trial registry run by the U.S. National Library of Medicine. It includes every study on the registry that lists at least one investigative site in South Korea and is recruiting, not yet recruiting, active but no longer recruiting, or enrolling by invitation: 3,365 studies in total at the last sync on 11 Oct 2026, 03:17 UTC. The full list can be downloaded as CSV or queried as JSON through the register API.

This page shows the 82 of those studies with a site in Seoul that also match the filters currently applied.

How many clinical trials are recruiting in Seoul?

31 of the 82 studies on this page are recruiting new participants as of the 11 Oct 2026, 03:17 UTC sync. A further 0 have not yet opened recruitment, 50 are active but closed to new participants, and 1 are enrolling by invitation only. Eligibility for any study is decided by its study team.

Summary by phase

Studies by phase (Seoul), 82 studies
PhaseStudiesRecruitingShare
Phase 3451854.9%
Phase 212414.6%
Phase 110312.2%
Phase 1/210412.2%
Phase 2/3526.1%

Most active sponsors

Lead sponsors with the most studies (Seoul)
Lead sponsorStudiesRecruiting
Janssen Research & Development, LLC8231
Listing here is informational and not medical advice; eligibility is determined by each study team. See also the Ireland, UK, EU, USA and China registers.