Raison d'être

Raison d'être (English pronunciation : ⁱ/ˈreɪzɒnˌdɛtrə/ ; French: [ʁɛzɔ̃ d‿ɛːtʁ] ( listen)) is a French phrase meaning "reason for existence."

Raison d'être may also refer to:

• Raison d'être (band), a Swedish dark-ambient-industrial-drone music project
• Raison D'être (album), an album by Australian jazz fusion guitarist Frank Gambale
• "raison detre", a song by Japanese rock band Dir en grey on the album Gauze
• "Raison d'etre", a song by Japanese rock band Nightmare used as opening theme of the anime Claymore
• "Raison d'être", a song used as the ending theme of the Chobits anime by Japanese singer and voice actress Rie Tanaka
• "Raison d'etre", a song by British rock band Buzzcocks from the album A Different Kind of Tension
• "Raison d'être～交差する宿命～", a song by Tomosuke Funaki under the alias Zektbach for the video game Beatmania IIDX 17 SIRIUS
• Raison d'être, an American Ale brewed by Dogfish Head