Encyclopedia 'O' Manga Releases
Newly added titles are in bold red. Newly modified titles are in bold.
| Title | Time [Pages] |
Dist. | Release | SRP |
| Oldboy Deluxe Edition: Book One [Hardcover] (GN 1-4) | DH | 2026-01-06 | ||
| Oldboy Deluxe Edition: Book Two [Hardcover] (GN 5-8) | DH | 2026-03-24 | ||
| Omega 6 (GN) | [216] | DH | 2025-10-21 | $14.99 |
| Otonari Complex (GN 5) | SSE | 2025-09-16 |