Days (stylized as 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 compiled into 39 individual tankōbon volumes as of August 2020. In North America, Kodansha USA started to publish the manga in digital-only format in April 2017.
An anime television series adaptation produced by MAPPA was broadcast from July to December 2016.
As of January 2017, the manga had over 4.5 million copies in circulation. In 2016, the manga won the 40th Kodansha Manga Awards in the shōnen category. In August 2020 it appears that the manga had 10 million copies in circulation.
Days follows the struggles of Tsukushi Tsukamoto, a shy, clumsy and bullied teenager about to start high school. He decides to get into Seiseki High School so he can be with his neighbour and childhood friend Sayuri Tachibana, who is one year his senior. Just as he is bullied after visiting Sayuri at her work, Tsukushi is saved by Jin Kazama, who scares away the bullies by attacking them with nunchucks, and declares himself to be a vagrant and lost in town. Jin then asks Tsukushi if he likes football and asks him to join him the same night for a futsal match as his team is one player short. Tsukushi surprises Jin by showing up after running almost ten miles under the heavy rain and without one shoe, after another run-in with his bullies. Short, young and clumsy, Tsukushi plays incredibly bad but keeps running throughout the whole match despite having injured his foot, showing such an effort that it motivates his other teammates. After a final sprint, Tsukushi manages to score the decisive goal, smashing his head against the pole by doing it. He finds out later that Jin will also be a freshman at Seiseki, and decides to join the football club to play with him, unknowing that the football club in Seiseki is nationwide famous and looked after by students from all the country. He manages to make it to the team despite being incredibly frail, weak and clumsy thanks to his continuous efforts and amazing perseverance, and further he shows incredible ability in motivating the rest of the team to work as hard as possible.
Written and illustrated by Yasuda Tsuyoshi, Days was serialized in Kodansha's Weekly Shōnen Magazine from April 24, 2013 to January 20, 2021. Kodansha has compiled its chapters into individual tankōbon volumes. The first volume was released on July 17, 2013. As of August 17, 2020, thirty-ninth volume have been published.
Kodansha USA publishes the manga in a digital-only format since April 25, 2017.
An anime television series adaptation by MAPPA began airing on July 2, 2016. Crunchyroll streams the series with English subtitles as it airs in Japan. Crunchyroll misreported that the Days anime had been licensed for a second season.
Two original video animations are bundled with the 21st and 22nd volumes of the manga, released on March 17 and May 17, 2017, respectively. The original animation DVDs (OADs), depicting the All-Japan High School Soccer Tournament's Tokyo Preliminary Round with Tōin Academy, were bundled with the limited editions of manga volumes 26 to 28 on March 16, May 17, and July 17, 2018.