Mogura no Uta (土竜の唄, "Mole's Song") is a Japanese manga series written by Noboru Takahashi [ja].

In reality, this dismissal hides a completely different mission, because Reiji is offered to become an undercover agent, in other words, a "mole".

Written and illustrated by Noboru Takahashi [ja], Mogura no Uta debuted in Shogakukan's seinen manga magazine Weekly Young Sunday on August 18, 2005.

[a] The magazine ceased its publication on July 31, 2008,[4] and the series moved to Big Comic Spirits on September 9 of that same year.

[7] The manga was adapted into a live-action film titled The Mole Song: Undercover Agent Reiji, which was directed by Takashi Miike and released in Japan on February 15, 2014.