is BoA's twenty-seventh Japanese single. It was released on February 18, 2009 in two formats, CD-only and CD+DVD. The CD edition also comes in a first press limited edition. Following "Eien", the second A-side, "Universe", features fellow J-pop singer Crystal Kay and label mate, Verbal of M-Flo. The third A-side is the acoustic version of Ravex's single "Believe in Love", which features BoA. The 4th track on the Limited Edition version of the single, Best Hit Mega Blend [Limited Edition Bonus Track], is a mashup of multiple of her best hits in Japan.
Track listing
Live performances 04/06 - Music Station (Eien) 04/09 - NHK BShi (Eien) (with I Did It for Love, Meri Kuri) 04/29 - Gekkan Melodix! (Eien)
Charts Oricon Sales Chart (Japan) Chart Peak position Sales total Chart Run Oricon Daily Singles Chart 5 Oricon Weekly Singles Chart 8 22,354 5 weeks
Certifications "Eien"
Chart Amount RIAJ full-length cellphone downloads Gold (100,000+)
References