| Ja Kanji: | 狂乱家族日記 |
| Ja Romaji: | The Diary of a Crazed Family |
| Genre: | Romantic comedy, science fiction |
| Type: | light novel |
| Author: | Akira |
| Illustrator: | x6suke |
| Publisher: | Enterbrain |
| Demographic: | Male |
| Imprint: | Famitsu Bunko |
| First: | June 1, 2005 |
| Last: | July 30, 2011 |
| Volumes: | 24 |
| Type: | manga |
| Author: | Eshika |
| Illustrator: | Shogo |
| Publisher: | Enterbrain |
| Demographic: | Shōnen |
| Magazine: | FB Online |
| First: | 2007 |
| Last: | 2010 |
| Volumes: | 4 |
| Type: | tv series |
| Director: | Yasuhiro Kuroda |
| Producer: | Tetsurō Satomi Takayuki Nagatani Tatsuya Ono Kenta Suzuki Yūichi Matsunaga Kensuke Kido |
| Music: | Tomoki Kikuya |
| Studio: | Nomad |
| Network: | AT-X, Bandai Channel, TVQ Kyushu Broadcasting, TV Kanagawa, Chiba TV, TV Shinhiroshima, Tokai TV, TV Saitama, TV Osaka |
| First: | April 12, 2008 |
| Last: | October 4, 2008 |
| Episodes: | 26 |
| Episode List: | List of Kyōran Kazoku Nikki episodes |
is a light novel series by Akira (日日日), with illustrations by x6suke. A 26-episode anime adaptation was broadcast in 2008.
A thousand years ago, Enka (閻禍), the god of destruction, died saying that its "child" would destroy the world. In order to prevent this, the Great Japanese Empire Paranormal Phenomena Bureau of Measures begins (code name: "code-Olympus"). The family is composed of Ōka Midarezaki, an official of the Bureau, and Kyōka Midarezaki, a self-proclaimed goddess, as parents; the children, human and otherwise, are the candidates – all potentially the prophesied "Child of Enka". The goal of the operation is to discern which child the prophecy applies to, as well as to teach him or her about the love of family in hopes of convincing him or her to not destroy the world. The story focuses on the mishaps and adventures that the ad hoc family experiences together.