I found all her discography and she really sound like Koda Kumi...you know that small voice Koda Kumi does like "Cheese Cheese Smile" in Run for your life? IT'S EXACTLY SAME!
This band debuted as Ragdoll in 2007 but they are active since 2004 as FORTUNA
Their picture:
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ZARD {Izumi Sakai (born Sachiko Kamachi)} / ♥ You're my angel forever ♥
6th February 1967~27th May 2007 / R.I.P
Amazing Set by JpopDream <3