Hiroshi Mutō is a Japanese manga artist and writer, recognized as the original creator of the series Hitman Part Time Killer, which is also known under the title Kyokara Hitman. His professional work primarily spans the mid-2000s, with his most significant and long-running contribution being the Hitman franchise.

Mutō began his manga career in 2001 with the one-shot Compare, for which he provided both the art and the story. In 2004, he worked as the artist on Pay Off. His major breakthrough came in 2005 with the launch of Hitman Part Time Killer, a series he both wrote and illustrated. The manga was published in ten volumes released between 2005 and 2008. A related work, Hitman Gaiden, was released as a fan book in 2008.

The Hitman Part Time Killer series has been adapted for the screen multiple times, all in live-action formats. The first adaptation was a television film in 2009, followed by a television drama series in 2014. A further drama adaptation aired in 2023, indicating the lasting appeal of Mutō’s original concept. While the source material has seen several live-action interpretations, there is no documented anime adaptation of his work as of the available records. The example given, Kyokara Hitman, directly corresponds to this series.