Use an app like iZip from the App Store. Open the file in iZip and tap "OK" to unzip.
If you're interested in Utada Hikaru's music, looking into her most popular singles or critically acclaimed albums could provide a good starting point. Her discography includes both Japanese and English-language works, showcasing her versatility as an artist. -ALBUM- Utada Hikaru - Single Collection vol 1.rar 1
The collection is ordered chronologically, allowing listeners to follow Utada's artistic growth: Use an app like iZip from the App Store