"Unlasting" (stylized in all lowercase) is a song by Japanese pop singer Lisa.

It was used as the first ending theme song for the anime series Sword Art Online: Alicization - War of Underworld.

[2] On 6 October 2019, the official website of the anime Sword Art Online: Alicization - War of Underworld revealed about the ending theme song "Unlasting" that would be sung by Lisa.

[5] The music video for "Unlasting" was directed by Kentaro Osawa, and produced by Hiroshi Takayama.

Some scene feature Lisa singing in the room with haze effect.