Heartsdales was a Japanese hip hop group composed of sisters Yumi Sugiyama (杉山ユミ, Sugiyama Yumi) and Emi Sugiyama (杉山エミ, Sugiyama Emi), known by their stage names Rum and Jewels, respectively.

Yumi was born on December 17, 1981, and Emi on December 4, 1976 in Tokyo, Japan. Their family moved to the Yonkers area of New York right after Yumi was born, due to their father's job as an interior designer. In 1995, the family moved back to Japan, and Yumi attended Tama Art University and Emi attended Keio University.