SWIMMER OSINT CTF

Story Driven CTF for Beginners (online JP Domestic)
SWIMMER OSINT CTF
by DIVER OSINT CTF

Jan. 17th 2026 (Sat)
AM 3:10 START (UTC)
Competition Time: 12 hours (END at PM 3:10 UTC)
Team Members: 1 - 6 people
Language: Japanese / English

NOTE
Unlike the DIVER OSINT CTF, the SWIMMER OSINT CTF is primarily a domestic event.
Most challenge materials will be in Japanese, so you may encounter some language barriers.
That being said, participants from anywhere in the world are welcome, and we will provide support in both English and Japanese.

For more information, follow the official DIVER OSINT CTF account on X
X: @DIVER_OSINT_CTF