Ex-SPEED member, Shimabukuro Hiroko, has been singing under the name "hiro" since SPEED dissolved a couple years back. It is no wonder that her solo debut single, AS TIME GOES BY, topped the Oricon charts at the #2 position, being that she was one of the two main vocalists in SPEED. Her two full albums to date, BRILLIANT and Naked and True, both secured a spot at #2 on Oricon as well.
If you look in terms of CD sales, hiro is definitely the more popular amongst the four SPEED members. This was also shown by Avex choosing to send her to perform in the United States at Sakura-con. Her songs range from soothing ballads to quick, catchy songs with excellent dance choreography.
Showing her versatility as a singer, Hiro released an all English jazz album under the name of Coco d'or in August 2004.
Her single Hikari no naka de is featured on the soundtrack to the movie Devilman.