Volume 4

Reception

 * In its first week of sales, Volume 4 reached the 21st place on the official Oricon manga rankings chart, and has sold an estimated amount of 49,737 copies.

Trivia

 * The Japanese volume also included an official character profile for Maki Oze revealing personal information about her such as her height, weight and favourite food.
 * In the Afterword Manga: Atsushiya section of this volume, the author Atsushi Ōkubo clears some concepts that might have confused some readers, explaining his enthusiasm for the official westernized name for his manga series (Fire Force), and changing the "Fire Soldier" on the brigade members' helmets to "Fire Force" due to it not making sense when looking at it from a team perspective. The name "Fire Force" was suggested as well as "Fire Squad" - with the former being chosen due to "squad" meaning a small-scale military team, in comparison to the large force that is the Special Fire Force.