# The Diary of a Middle-Aged Sage's Carefree Life in Another World

The Diary of a Middle-Aged Sage's Carefree Life in Another World (アラフォー賢者の異世界生活日記, Arafō Kenja no Isekai Seikatsu Nikki) is a Japanese light novel series written by Yasukiyo Kotobuki and illustrated by Johndee. It began serialization on the user-generated novel publishing website Shōsetsuka ni Narō in February 2016. It was later acquired by Media Factory who began publishing it under their MF Books imprint in September 2016. A manga adaptation illustrated by 888 began serialization on Kadokawa's ComicWalker manga website in April 2018. A second manga adaptation illustrated by Maneki titled The Diary of a Middle-Aged Teacher's Carefree Life in Another World began serialization on Square Enix's Manga Up! manga website and app in October of the same year.

## Media
### Light novel

Written by Yasukiyo Kotobuki, The Diary of a Middle-Aged Sage's Carefree Life in Another World began serialization on the user-generated novel publishing website Shōsetsuka ni Narō on February 7, 2016. It was later acquired by Media Factory who began releasing it with illustrations by Johndee under their MF Books light novel imprint on September 23, 2016. Twenty volumes have been released as of February 2025. The light novels are licensed in English by J-Novel Club.
A spin-off light novel series, titled Arafō Kenja no Isekai Seikatsu Nikki Zero: Sword and Sorcery World, began publication under the same imprint on August 25, 2023.

#### Volumes

| No. | Original release date | Original ISBN | North American release date | North American ISBN |
| 1 | September 23, 2016 | 978-4-04-068641-7 | December 14, 2023 | 978-1-71-837384-6 |
| 2 | February 25, 2017 | 978-4-04-069086-5 | March 20, 2024 | 978-1-71-837386-0 |
| 3 | April 25, 2017 | 978-4-04-069188-6 | July 31, 2024 | 978-1-71-837388-4 |
| 4 | August 25, 2017 | 978-4-04-069404-7 | October 30, 2024 | 978-1-71-837390-7 |
| 5 | November 25, 2017 | 978-4-04-069589-1 | February 19, 2025 | 978-1-71-837392-1 |
| 6 | April 25, 2018 | 978-4-04-069867-0 | — | — |
| 7 | September 25, 2018 | 978-4-04-065169-9 | — | — |
| 8 | December 25, 2018 | 978-4-04-065390-7 | — | — |
| 9 | April 25, 2019 | 978-4-04-065683-0 | — | — |
| 10 | August 24, 2019 | 978-4-04-064056-3 | — | — |
| 11 | December 25, 2019 | 978-4-04-064269-7 | — | — |
| 12 | April 25, 2020 | 978-4-04-064581-0 | — | — |
| 13 | August 21, 2020 | 978-4-04-064869-9 | — | — |
| 14 | March 25, 2021 | 978-4-04-680322-1 | — | — |
| 15 | September 25, 2021 | 978-4-04-680764-9 | — | — |
| 16 | February 25, 2022 | 978-4-04-681174-5 | — | — |
| 17 | September 25, 2022 | 978-4-04-681744-0 | — | — |
| 18 | April 25, 2023 | 978-4-04-682418-9 | — | — |
| 19 | December 25, 2023 | 978-4-04-683162-0 | — | — |
| 20 | February 25, 2025 | 978-4-04-684567-2 | — | — |

#### Arafō Kenja no Isekai Seikatsu Nikki Zero: Sword and Sorcery World

| No. | Release date | ISBN |
| 1 | August 25, 2023 | 978-4-04-682763-0 |
| 2 | August 23, 2024 | 978-4-04-683964-0 |

### Manga

A manga adaptation illustrated by 888 began serialization on Kadokawa's ComicWalker manga website on April 25, 2018. The manga's chapters have been collected by Media Factory into eight tankōbon volumes as of February 2025.
A second manga adaptation illustrated by Maneki, titled The Diary of a Middle-Aged Teacher's Carefree Life in Another World, began serialization on Square Enix's Manga Up! manga website and app on October 16 of the same year. The second manga's chapters have been collected into fifteen tankōbon volumes as of March 2025. The second manga is published digitally in North America by Square Enix via their Manga Up! Global app.

#### Volumes

| No. | Release date | ISBN |
| 1 | November 21, 2018 | 978-4-04-065030-2 |
| 2 | July 22, 2019 | 978-4-04-065822-3 |
| 3 | June 22, 2020 | 978-4-04-064465-3 |
| 4 | March 22, 2021 | 978-4-04-680289-7 |
| 5 | December 22, 2021 | 978-4-04-680887-5 |
| 6 | October 21, 2022 | 978-4-04-681455-5 |
| 7 | November 22, 2023 | 978-4-04-682525-4 |
| 8 | February 20, 2025 | 978-4-04-684495-8 |

#### The Diary of a Middle-Aged Teacher's Carefree Life in Another World

| No. | Release date | ISBN |
| 1 | March 13, 2019 | 978-4-7575-6042-0 |
| 2 | July 12, 2019 | 978-4-7575-6196-0 |
| 3 | February 12, 2020 | 978-4-7575-6509-8 |
| 4 | July 7, 2020 | 978-4-7575-6726-9 |
| 5 | December 7, 2020 | 978-4-7575-6982-9 |
| 6 | May 7, 2021 | 978-4-7575-7235-5 |
| 7 | October 7, 2021 | 978-4-7575-7506-6 |
| 8 | March 7, 2022 | 978-4-7575-7783-1 |
| 9 | August 5, 2022 | 978-4-7575-8051-0 |
| 10 | February 7, 2023 | 978-4-7575-8375-7 |
| 11 | July 6, 2023 | 978-4-7575-8640-6 |
| 12 | December 7, 2023 | 978-4-7575-8929-2 |
| 13 | May 7, 2024 | 978-4-7575-9169-1 |
| 14 | October 7, 2024 | 978-4-7575-9448-7 |
| 15 | March 7, 2025 | 978-4-7575-9709-9 |

## Reception

By April 2022, the series has over 2.2 million copies in circulation.