"Glass Skin" (stylized GLASS SKIN) is a single by Dir En Grey, released on September 10, 2008 in Japan in a regular and limited edition, the limited copy featuring a bonus live track as well as a sticker of the band and a poster. The single was released as a digital download on 17 September 2008.

"Glass Skin" is one of the two singles to be featured on the album Uroboros, along with its predecessor "Dozing Green". Like its counterpart, the song is re-recorded in English for the album.

The artwork on the cover, booklet, and accompanying promotional materials of "Glass Skin", as well as some artwork used on the official website was created by Osaka-based artist, Genta Kosumi.

The first B-side, "Undecided", is a rerecording of a track from band's third album, Kisou. The second B-side, "Agitated Screams of Maggots -Unplugged-", is an unplugged arrangement of the band's 2006 single. Another B-side for the single, included only with the limited edition, is a live version of Ryoujoku no Ame; the recording is from a concert at Yokohama Blitz on May 23, 2008.

The music video for "Glass Skin" was premiered on MTV in Japan. It is largely computer generated, but features images of the band.

All lyrics written by Kyo; all music composed by Dir En Grey*.

* Although "Undecided" is originally credited with Die's composition, this arrangement is credited to the band as a whole.

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