The third season of Sword Art Online titled Sword Art Online: Alicization, is an anime series adapted from the light novel series of the same name written by Reki Kawahara and illustrated by Abec. It was produced by A-1 Pictures and directed by Manabu Ono. It includes the “Alicization ARC ” and adapts from the novel’s ninth volume, Alicization Beginning, to the fourteenth volume, Alicization Uniting. The second part of the anime, titled Sword Art Online: Alicization-War of Underworld, adapted from the novel’s fifteenth volume, Alicization Invading, to the eighteenth volume, Alicization Lasting. Although not covered in the light novels, Alicization took place after Sword Art Online The Movie: Ordinal Scale, because it incorporated elements from films that were not in the novel.
The series aired on October 7, 2018, with an hourly world premiere in Japan, the United States, Australia, France, Germany, Russia, and South Korea on September 15, 2018. The second part of the series will premiere on October 12, 2019, with recap episodes summarising the first section aired on October 5, 2019. Aniplex of America announced that the English version will begin airing on Adult Swim Toonami starting February 9, 2019.
The first opening theme was “Adamas ” by LiSA and her first ending theme is “Iris ” (アイリス) by Eir Aoi. The second opening song is “Resister ” by Asca and the second ending theme is “Forget-me-not” by ReoNa.
In the second part of the anime, the first opening theme is “Resolution” by Haruka Tomatsu, and the first ending theme is “Unlasting” by LiSA. The second opening theme is “Anima ” by Reona and the second ending theme is “I will ” by Eir Aoi. The music is composed by Yuki Kajiura.