title: Eien (disambiguation)
text: # Eien (disambiguation)
  
  Eien is a Japanese era name.
  
  Eien may also refer to:
  
  * Eien (album), a 1999 album by Zard
  * "Eien" (Zard song), 1997
  * "Eien" (Beni song), 2012
  * "Eien / Universe / Believe in Love", a 2009 song by BoA
  