"Sekai ni Hitotsu Dake no Hana" (世界に一つだけの花^?, "The One and Only Flower in the World") is a song recorded by Japanese boy band SMAP. The Noriyuki Makihara composed song was released as a single in 2003 and sold more than 2.57 million copies, becoming the third best-selling single in Japan in Oricon history. Along with Hikaru Utada's "Colors", it was one of the only two singles to sell over a million copies in 2003, a year that saw CD sales declining due to the Japanese economic slump. The single made it to the top of the Oricon 2003 Yearly singles chart. As of November 2016 it is the fourth best-selling single in Japan, with 2.932 million copies sold. This song became popular in karaoke. In 2003, Nakai was identified as the highest tax payer of any entertainer in Japan by the Japanese National Tax Bureau. That same year, he was involved in at least four television shows simultaneously, in addition to commercials.

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