2021

Ron Kamonohashi: Deranged Detective-related events for 2021.
==January==
* 3: Chapter 9, "The Case of the Island Observatory Murder Pt. 1" is released.
* 10: Chapter 10, "The Case of the Island Observatory Murder Pt. 2" is released.
* 17: Chapter 11, "The Case of the Island Observatory Murder Pt. 3" is released.
* 24: Chapter 12, "The Case of the Island Observatory Murder Pt. 4" is released.
* 30: Chapter 13, "The Case of the Island Observatory Murder Pt. 5" is released.
==February==
* 4: Volume 1 is released.
* 6: Chapter 14, "The Case of the Poisoned Latté Pt. 1" is released.
* 8: A one-shot is published in the Weekly Shōnen Jump Issue 10.
* 13: Chapter 15, "The Case of the Poisoned Latté Pt. 2" is released.
* 21: The one-shot is re-released online on Shōnen Jump+. Unlike other chapters, it is not simultaneously released by MangaPlus.
==March==
* 6: Chapter 16, "The Case of the Mad Chameleon Murder Pt. 1" is released.
* 20: Chapter 17, "The Case of the Mad Chameleon Murder Pt. 2" is released.
==April==
* 3: Chapter 18, "The Case of the Yadagami-sama Murders Pt. 1" is released.
* 17: Chapter 19, "The Case of the Yadagami-sama Murders Pt. 2" is released.
* 24: Chapter 20, "The Case of the Yadagami-sama Murders Pt. 3" is released.
* 30: Volume 2 is released.
==May==
* 1: Chapter 21, "The Case of the Yadagami-sama Murders Pt. 4" is released.
* 15: Chapter 22, "The Case of the Shibuya Revelation Serial Murders Pt. 1" is released.
* 22: Chapter 23, "The Case of the Shibuya Revelation Serial Murders Pt. 2" is released.
* 29: Chapter 24, "The Case of the Shibuya Revelation Serial Murders Pt. 3" is released.
==June==
* 12: Chapter 25, "The Case of the Shibuya Revelation Serial Murders Pt. 4" is released.
* 19: Chapter 26, "The Case of the Shibuya Revelation Serial Murders Pt. 5" is released.
* 26: Chapter 27, "The Case of the Shibuya Revelation Serial Murders Pt. 6" is released.
==July==
* 10: Chapter 28, "The Case of the Midsummer Beach Hut Drowning Pt. 1" is released.
* 17: Chapter 29, "The Case of the Midsummer Beach Hut Drowning Pt. 2" is released.
* 24: Chapter 30, "The Case of the Midsummer Beach Hut Drowning Pt. 3" is released.
==August==
* 1: Instead of a chapter, a special illustration is released.
* 4: Volume 3 is released. It contains the one-shot which is now entitled "The Case of the Sandbox Murder at Dawn."
** The first merchandise line is released by Anique Shop (Japan-only).
* 6: The manga begins serialization in Thailand under the title "สืบลับฉบับคาโมโนะฮาชิ รอน."
* 7: Chapter 31, "The Case of the Genius Composer Kidnapping Pt. 1" is released.
* 14: Chapter 32, "The Case of the Genius Composer Kidnapping Pt. 2" is released.
* 20: The manga begins serialization in Taiwan under the title "鴨乃橋論的禁忌推理."
* 21: Chapter 33, "The Case of the Genius Composer Kidnapping Pt. 3" is released.
==September==
* 4: Chapter 34, "The Case of the Genius Composer Kidnapping Pt. 4" is released.
* 11: Chapter 35, "The Case of the Psychological Research Lab Murder Pt. 1" is released.
* 18: Chapter 36, "The Case of the Psychological Research Lab Murder Pt. 2" is released.
==October==
* 2: Chapter 37, "The Case of the Psychological Research Lab Murder Pt. 3" is released.
* 10: Chapter 38, "The Case of the Plateau Auberge Serial Murders Pt. 1" is released. It marks one year of serialization.
* 17: Chapter 39, "The Case of the Plateau Auberge Serial Murders Pt. 2" is released.
* 31: Chapter 40, "The Case of the Plateau Auberge Serial Murders Pt. 3" is released.
==November==
* 4: Volume 4 is released.
* 7: Chapter 41, "The Case of the Plateau Auberge Serial Murders Pt. 4" is released.
* 14: Chapter 42, "The Case of the Plateau Auberge Serial Murders Pt. 5" is released.
** Start of a "Guess the Culprit"-event for the Plateau Auberge Serial Murders Case. Among the people who have guessed correctly, five are randomly chosen to receive a canvas board signed by Akira Amano.Plateau Auberge Serial Murders Poll: The prize — Akira Amano on Twitter
* 27: End of the "Guess the Culprit"-event for the Plateau Auberge Serial Murders Case.
* 28: Chapter 43, "The Case of the Plateau Auberge Serial Murders Pt. 6" is released.
==December==
* 5: Chapter 44, "The Case of the Plateau Auberge Serial Murders Pt. 7" is released.
* 12: Chapter 45, "The Case of the Plateau Auberge Serial Murders Pt. 8" is released.
* 18-19: A new drawing is released for Jump Festa 2022.
* 21: Chapter 46, "The Case of the Fortuneteller Prince Murder Pt. 1" is released.
==References==
==Navigation==
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