Masterpiece (Mami Kawada song)

"masterpiece" is the seventh single released by the J-pop singer, Mami Kawada, and was released on February 4, 2009. The title track was used as the second opening theme for the anime series A Certain Magical Index which is her third tie-in with the anime series. This is also Kawada's first single to be produced by a female composer/arranger of I've Sound, which is Maiko Iuchi.

The coupling song jellyfish was used as an insert song on the twenty-third episode of A Certain Magical Index making this Kawada's 4th tie-in with the said anime series.

The single will come in a limited CD+DVD edition (GNCV-0013) and a regular edition (GNCV-0014). The DVD will contain the Promotional Video for masterpiece.

Track listing

 * 1) masterpiece—4:37
 * Lyrics: Mami Kawada
 * Composition/Arrangement: Maiko Iuchi
 * 1) jellyfish—4:26
 * Lyrics: Mami Kawada
 * Composition: Tomoyuki Nakazawa
 * Arrangement: Tomoyuki Nakazawa, Takeshi Ozaki
 * 1) masterpiece (instrumental) -- 4:37
 * 2) jellyfish (instrumental) -- 4:24

Reception
It peak ranked 12th on the weekly Oricon singles chart and remained on the chart for nine weeks.