"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.

[1] 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.

As of December 2016 it is the third best-selling single in Japan, with 3.000 million copies sold.

[3] This song became popular in karaoke.