Koroshiya-san: The Hired Gun
Japanese title: 殺し屋さん The hired gun
Alternative titles: Mr. Hitman
Type: TV
Source: 4-koma manga
Episodes: 10
Status: Finished Airing
Aired: Oct 11, 2013 to Dec 13, 2013
Broadcast: Fridays at 01:00 (JST)
Duration: 3 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Opera House
Producers: KlockWorx, Studio Mausu
Genres: Action, Comedy, Suspense
Themes: Detective
Demographics: Seinen

The comedy story follows the title character, who is regarded by himself and others as the best hit man in Japan. He goes by the motto, "If I have an assignment, I will kill anything." However, his "killing" assignments have expanded to include everything from summer vacation homework to housekeeping. "The hit man never fails to kill the target. Though he does not aim to, he also never misses the laughter."

(Source: ANN)