| Type: | novel series |
| Author: | Daken |
| Publisher: | Shōsetsuka ni Narō |
| First: | February 1, 2023 |
| Last: | September 29, 2023 |
| Type: | light novel |
| Author: | Daken |
| Illustrator: | toi8 |
| Publisher: | Kadokawa Shoten |
| Demographic: | Male |
| Imprint: | Kadokawa Sneaker Bunko |
| First: | September 29, 2023 |
| Volumes: | 2 |
| Type: | manga |
| Author: | Daken |
| Illustrator: | Akira Ishida |
| Publisher: | Kadokawa Shoten |
| Demographic: | Seinen |
| Magazine: | KadoComi |
| First: | August 1, 2024 |
is a Japanese light novel series written by Daken and illustrated by toi8. It was serialized as a web novel published on the user-generated novel publishing website Shōsetsuka ni Narō from February to September 2023. It was later acquired by Kadokawa Shoten who began publishing it under their Kadokawa Sneaker Bunko light novel imprint in September 2023. A manga adaptation illustrated by Akira Ishida began serialization on Kadokawa Shoten's KadoComi manga website in August 2024.
Written by Daken, Dare ga Yūsha o Koroshita ka was initially serialized on the user-generated novel publishing website Shōsetsuka ni Narō form February 1 to September 29, 2023. Kadokawa Shoten acquired the series and began publishing it with illustrations by toi8 under their Kadokawa Sneaker Bunko light novel imprint on September 29, 2023. Two volumes have been released as of August 2024.
A manga adaptation illustrated by Akira Ishida began serialization on Kadokawa Shoten's KadoComi manga website on August 1, 2024.[2]
The series was ranked second in the 2025 edition of Takarajimasha's Kono Light Novel ga Sugoi! guidebook in the bunkobon category and first in the new work category.[3]
The series has over 200,000 copies in circulation.[4]