"Glass" is an improvisational piece composed by Ryuichi Sakamoto and Carsten Nicolai, known by his stage name as Alva Noto, for Yayoi Kusama's installation Dots Obsession—Alive, Seeking for Eternal Hope, which ran in September 2016 at Philip Johnson's Glass House. A film of the performance was uploaded to the Glass House's official Vimeo account and website on November 11, 2016, and an audio recording of the 37-minute composition was released as an album on Nicolai's label NOTON on February 16, 2018. "Glass" is an unconventional ambient piece that uses sounds from a keyboard, glass-made singing bowls, and digital processing of the House's glass walls. The composition consists of developing layers of sounds performed over a single drone. It was praised by many professional reviewers as a display of Sakamoto and Nicolai's growing artistry.