Hearts Grow was a Japanese band from Motobu, Okinawa. Their first single Grow!! was released independently (in limited quantities) on 19 April 2006. Hearts Grow made their major label debut on 18 October 2006, with the release of their first single Road. Their second single Yura Yura (ユラユラ) was released in Japan on 6 December 2006. They are known for performing the ninth opening of Naruto, the fourth ending of Demashita! Powerpuff Girls Z, the fourth opening for Gintama and the first opening of Tetsuwan Birdy: Decode.

As of late 2009 the band has been on hiatus. The lead singer Haruna plans on a solo career.