is a Japanese basketball-themed manga series written and illustrated by Takeshi Hinata. It has been serialized in Kodansha's manga magazine Weekly Shà Ânen Magazine since December 2003, with its chapters collected in 51 volumes as of June 2019. A 50-episode anime television series adaptation produced by Diomedéa was broadcast from October 2019 to September 2020.
Sora Kurumatani made a promise to his mother, "I will dominate my first high school tournament". But as he joins the basketball club after entering Kuzuryà « High School, he finds out that it's become a stomping ground for delinquents. A place where everything but basketball is done, but with Sora's genuine zeal for basketball, things begin to stir.
Ahiru no Sora, written and illustrated by Takeshi Hinata, began in Kodansha's manga magazine Weekly Shà Ânen Magazine on December 10, 2003. In January 2019, Hinata announced that the manga has entered its final arc. Kodansha has compiled its chapters into individual . The first volume was published on May 15, 2004. As of June 17, 2019, fifty-one volumes have been released.
An anime television series adaptation was announced in February 2018. The series was directed by Shingo Tamaki, with Keizà  Kusakawa serving as chief director, and written by Gà  Zappa, with animation by Diomedéa. Character designs were provided by Yoshino Honda, and Hiroaki Tsutsumi composed the music. The series aired from October 2, 2019, to September 30, 2020, on TV Tokyo, AT-X, and BS TV Tokyo. The opening theme song is "Happy Go Ducky!" by the Pillows, while the ending theme song is "Tsubasa" by saji. The second opening theme song is "Never Mind" by Flumpool, while the ending theme song is "Over" by Yuma Uchida.
Sentai Filmworks has licensed the series worldwide excluding Asia. An English dub premiered on November 13, 2019. Muse Communication has licensed the series in Asia-Pacific and streamed it on Muse Asia YouTube channel.
Several volumes of the series appeared on Oricon's list of best-selling manga volumes from 2009 to 2011. It was the 23rd best-selling manga series in Japan in 2011, with 1,739,105 copies sold. By February 2018, the manga had over 24 million copies in circulation.