The official Twitter account for Yoshiaki Tabata and Yūki Yogo’s Ninja Slayer manga revealed on December 8 that the manga has ended.
Kadokawa published the manga’s 12th compiled book volume, titled Ninja Slayer: Stranger Stranger Than Fiction, in June 2017, and Vertical released the eighth volume, Ninja Slayer: Merry Christmas Neo Saitama, last May.
Kodansha Comics also publishes a separate manga adaptation of the franchise by Kōtarō Sekine titled Ninja Slayer Kills.
In the first volume of Ninja Slayer, the Neo Saitama of the future is a sprawling urban landscape constantly flooded by neon light.