Is the Anime Really Finished?#
If you are wondering whether you can binge-watch the entire series and reach a final conclusion, the answer is no. Butt Detective (also known as Oshiri Tantei) is very much ongoing.
Not only has the series seen a continuous stream of releases since 2018, but recent data from 2026 shows it is still actively appearing in the Japanese Animation TV Rankings as recently as July 2026. With new entries appearing as late as April 2026, including a new series and a spinoff adaptation, viewers will find that the world of Butt Detective is still expanding. You can watch the anime on Prime Video to catch up on the latest mysteries.
Audience and Appeal#
Butt Detective falls squarely into the mystery genre. While its title is whimsical, the series has maintained a consistent presence in the Japanese Animation TV Rankings throughout 2026, suggesting a strong and steady appeal to its audience. It is best suited for viewers who enjoy lighthearted mystery-solving and episodic adventures.
If you love the characters, you might also want to buy some official merchandise to celebrate your favorite detective.
Recommended Watch Order#
Because of the sheer volume of TV seasons, movies, and specials, the watch order can seem daunting. To help you navigate, we have provided a detailed relationship tree below the article. Here are the best ways to approach the series:
Release Order#
For those who want to experience the series as it aired, simply follow the calendar. Start with the original TV series from May 2018 and progress through the annual sequels that ran through 2025 and into 2026.
Completionist Order#
If you want every single piece of content, you will need to integrate the films and specials into the TV timeline:
- TV Series: Follow the main sequel line from 2018 through the 2026 release.
- The Movie Arc: Start with Eiga Oshiri Tantei: Curry Naru Jiken (2019) and follow its sequels (Tentō Mushi Iseki no Nazo, Sufūre-to no Himitsu, Shiriarty, Saraba Itoshiki Aibō, and Star and Moon).
- Related Extras: Include Eiga Oshiri Tantei Yume no Jumbo Sweet Potato Matsuri (2022), Oshiri Tantei Cosmic Front (2023), and Eiga Oshiri Tantei Nandemo Kaiketsu Club tai Kaitō U (2024).
- The Spinoff: Finally, dive into the Oshiri Dandy the Young content.
For Manga Readers#
If you don’t mind continuing with the source material, you can explore the Oshiri Dandy the Young manga, which began serialization in May 2020, well before its anime adaptation premiered in April 2026. You can buy the manga here to get ahead of the animation.
If you found this guide helpful and want to keep our investigation into anime conclusions going, please consider supporting us on Ko-fi!
Summary of Content#
Whether you are starting with the 2018 series or jumping straight into the 2026 releases, Butt Detective offers a massive library of mystery content. Between the main TV sequels and the expansive movie line, there is plenty to commit to.
Butt Detective • anime • 2018-05-03 to 2019-03-30
└─(sequel)→ Butt Detective • anime • 2019-07-06 to 2019-09-28
└─(sequel)→ Butt Detective • anime • 2020-04-04 to 2020-06-27
└─(sequel)→ Butt Detective • anime • 2021-04-03 to 2021-06-26
└─(sequel)→ Butt Detective • anime • 2022-04-09 to 2022-07-02
└─(sequel)→ Butt Detective • anime • 2023-04-08 to 2023-05-27
└─(sequel)→ Butt Detective • anime • 2023-10-07 to 2023-11-18
└─(sequel)→ Butt Detective • anime • 2024-04-06 to 2024-05-25 (eps. 1-8)
└─(sequel)→ Butt Detective • anime • 2025-04-05 to 2025-05-24 (eps. 1-8)
└─(sequel)→ Butt Detective • anime • 2026-04-04
└─(related)→ Eiga Oshiri Tantei: Curry Naru Jiken • anime • 2019-04-26
└─(sequel)→ Eiga Oshiri Tantei: Tentō Mushi Iseki no Nazo • anime • 2020-08-14
└─(sequel)→ Eiga Oshiri Tantei: Sufūre-to no Himitsu • anime • 2021-08-13
└─(sequel)→ Eiga Oshiri Tantei Shiriarty • anime • 2022-03-18
└─(related)→ Eiga Oshiri Tantei Yume no Jumbo Sweet Potato Matsuri • anime • 2022-03-18
└─(sequel)→ Eiga Oshiri Tantei Saraba Itoshiki Aibō (Oshiri) yo • anime • 2024-03-20
└─(related)→ Eiga Oshiri Tantei Nandemo Kaiketsu Club tai Kaitō U • anime • 2024-03-20
└─(sequel)→ Eiga Oshiri Tantei: Star and Moon • anime • 2025-03-20
└─(related)→ Oshiri Tantei Cosmic Front • anime • 2023-03-18 (ep. 1)
└─(spinoff)→ Oshiri Dandy the Young • manga • 2020-04-02 (serialized in Saikyō Jump, May 2020)
└─(adaptation)→ Oshiri Dandy the Young • anime • 2026-04-04
