Akira Toriyama, the creator and manga artist for the Dragon Ball series, was commissioned by Avex Trax to draw an illustration of Hamasaki, which appeared on the DVD version. Both CD version features two remixes of 'Rule' while the first version features two remixes of her single ' Green' and the second features two remixes of her single ' Days'. 'Rule/Sparkle' was released on Februby Avex Trax and Avex Taiwan in three different versions: two different CD editions and a CD and DVD version. 'Sparkle' is used in advertisements for the Honda Zest Spark, while 'Rule' was used as the international theme song for the 2009 adventure film Dragonball Evolution. With 'Rule' composed by Miki Wantanabe and 'Sparkle' composed by Kazuhiro Hara, both songs were written by Hamasaki and produced by long-time collaborator Max Matsuura. 3 Live performances and other appearances.A music video was directed for each song. It has also been included on several tours and countdown live shows conducted by Hamasaki. To promote 'Rule/Sparkle', Hamasaki performed the song on several Japanese television series.

The song was certified gold by Recording Industry Association of Japan (RIAJ). Released in Japan and Taiwan, it peaked at number one on the Japanese Oricon Singles Chart, becoming her thirty-second number one single on the chart. 'Rule/Sparkle' received mixed reviews from most limited music critics, some of whom favoured 'Rule' over 'Sparkle'.

'Rule' was used as the international theme song for the 2009 film Dragonball Evolution. The song was released on a CD and DVD format on Februas the second single from the album. ' Rule'/' Sparkle' is a double A-side single by Japanese recording artist Ayumi Hamasaki from her tenth studio album, NEXT LEVEL' (2009).

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