ZARD’s music has a way of slipping into the corners of the heart and staying there. For millions of listeners in Japan and across Asia, Izumi Sakai’s voice—soft, earnest, and quietly resilient—defined a certain era of pop-rock: emotional ballads, radio-ready hooks, and lyrical honesty. Mention a “20th Anniversary Single Collection” and you’re talking about more than a compilation: you’re talking about a cultural touchstone, a timeline of hits that maps both an artist’s growth and the soundtrack of a generation.