Days is a Japanese sports manga series written and illustrated by Tsuyoshi Yasuda. It was serialized by Kodansha's Weekly Shōnen Magazine from April 2013 to January 2021, with its chapters collected in 42 tankōbon volumes. In North America, the manga is licensed for English digital release by Kodansha USA.

Pony Canyon Inc. , also known by the shorthand form Ponican , is a Japanese company, established on October 1, 1966, which publishes music, DVD and VHS videos, movies, and video games. It is affiliated with the Japanese media group Fujisankei Communications Group. Pony Canyon is a major leader in the music industry in Japan, with its artists regularly at the top of the Japanese charts. Pony Canyon is also responsible for releasing taped concerts from its artists as well as many anime productions and several film productions.