Under Doctor

Heiji Kino is the world famous Under Doctor, an assassin turned doctor that can use his ability of seeing vital points in people to heal them, rather than hurt them.

Now, with his special eyes and know-how of medical science, he will save anyone and everyone in the criminal underworld and beyond.

Written and illustrated by Kyō Tanimoto, the series began serialization in Shueisha's shōnen manga magazine Weekly Shōnen Jump on January 26, 2026. As of August 2026, the series' individual chapters have been collected into two tankōbon volumes.

Viz Media and Manga Plus are publishing chapters of the series in English simultaneously with their Japanese release.

A voice comic adaptation was produced to promote the release of the first volume.

Volumes

Chapters not yet in tankobon format

1. "You Can Do It, Hana!"
2. "The Snake Whisperers"
3. "Haiji and Kusumi"
4. "Doctor, Food, Shelter!"
5. "The Fake Doctor and the Under Doctor"
6. "The Fake Doctor and the Under Doctor, Part 2"
7. "Stun Gun to the Head"
8. "Haiji and Shuli's Exciting Snowy Mountain Adventure"
9. "Scared"
10. "Haiji's Long Day, Part 1"
11. "Haiji's Long Day, Part 2"
12. "Haiji's Long Day, Part 3"

The series was recommended by Kōhei Horikoshi.

Tulisha Srivastava of ComicBook.com described the first chapter as "exciting" and called it a successor to Sakamoto Days. J.R. Waugh of Screen Rant described it as "fun, uniquely odd Shonen Jump action" and compared the plot to House. Isaiah Colbert of Aftermath liked the emphasis on the accuracy of the medical procedures. He also praised the main character, calling him easy to root for.