Is The Days of Diamond Finished? No — Still Ongoing, 10 Volumes
No — The Days of Diamond is not finished yet (still ongoing). 10 volumes are out in Japan; the latest came out in July 2026. The next volume is scheduled for 2026-11-18.
Everything below reflects the Japanese edition — the source of truth that runs months or years ahead of English releases — computed from official publication records.
Volumes in Japan: 10 (latest: ダイヤモンドの功罪 10, 2026-07-03)
Next volume in Japan: 2026-11-18 (ダイヤモンドの功罪 11) — already scheduled.
Status: No — The Days of Diamond is not finished yet (still ongoing). 10 volumes are out in Japan; the latest came out in July 2026. The next volume is scheduled for 2026-11-18.
Serialized since: 2023