Gokusen (ごくせん) is a Japanese manga series written and illustrated by Kozueko Morimoto. It was serialized in Shueisha's You from 2000 to 2007, with its chapters collected in 15 wideban volumes. The story follows Kumiko Yamaguchi, the granddaughter of a yakuza boss and teacher at an all-male private high school.

The manga was adapted into a three-season television drama, with Yukie Nakama in the title role, which was broadcast on Nippon TV from 2002 to 2008, followed by a theatrical film, which premiered in 2009. A 13-episode anime television series adaptation by Madhouse was broadcast on Nippon TV in 2004. The anime series was licensed in North America by Media Blasters.