What makes Eien by Zard notable?

'Eien' features two songs that became major hits in Japan, further cementing Zard's influence in the J-Pop genre. The title track reached high positions on the charts, contributing to Zard's legacy as one of the leading pop acts of the 1990s. Released on August 20, 1997, 'Eien' came during Zard's commercial peak, following their successful albums 'Good-bye My Loneliness' and 'ZARD BLEND'. This album solidified their status in the J-Pop scene, showcasing their signature sound that blended pop with emotional depth.