Wandering Son (Japanese: 放浪息子, Hepburn: Hōrō Musuko) is a Japanese manga series written and illustrated by Takako Shimura. It was originally serialized in Comic Beam from the December 2002 to August 2013 issue, and published in 15 tankōbon volumes by Enterbrain from July 2003 to August 2013. The series is licensed in English by Fantagraphics Books, which released the first volume in North America in July 2011. A 12-episode anime adaptation produced by AIC Classic and directed by Ei Aoki aired in Japan between January and March 2011. Eleven episodes aired on television, with episodes 10 and 11 edited into a single episode, and were released individually on their respective BD/DVD volumes.

The story depicts a young trans girl named Shuichi Nitori, a student who develops a close relationship with another transgender classmate, a young boy named Yoshino Takatsuki. The series deals with issues such as coming to terms with being transgender, finding one's gender identity, the onset of puberty and gender dysphoria, and the social pressures associated with being transgender. Shimura was originally going to write the story about a girl in high school who wants to be a boy, but she realized that a boy who wants to be a girl before entering into puberty would have many worries related to growing up, and changed the story to fit this model. Wandering Son was selected as a recommended work by the awards jury of the tenth Japan Media Arts Festival in 2006. The series has been lauded for its exploration of gender identity and its depiction of transgender characters at the core of the story, though the emotional realism of the young characters has been called into question.