is a Japanese manga series written and illustrated by Tetsuya Okuyama. It began serialization on Kodansha's Magazine Pocket manga service in April 2025.
Synopsis The series is centered around a supernatural phenomenon that manifests when a crime is committed called "Sin". Experienced detective Ren Hizuki, who has previously tackled cases involving "Sin" as part of the Investigation Division 1, has been transferred to the newly established Public Security Bureau, Division 9; pairing with the cowardly, but mysterious Yushiro Oboro in order to tackle cases involving "Sin".
Publication Written and illustrated by Tetsuya Okuyama, K-9: Public Security Bureau, Division 9 – Special Abilities Countermeasure began serialization on Kodansha's Magazine Pocket manga service on April 16, 2025. Its chapters have been collected in eight volumes as of October 2026.
The series' chapters are published in English on Kodansha's K Manga app.
Reception The series was ranked tenth in the Nationwide Bookstore Employees' Recommended Comics list of 2026.
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