Hikari (stylized as hikari) is the fifth and first major studio album by Japanese visual kei rock band SID, released on July 1, 2009 by Ki/oon Music. The single "Uso" is a ending theme of ' and "Monochrome no Kiss" is the first opening theme of Black Butler.
Hikari reached number two on Oricon Albums Chart. In July 2009, it was certified gold disc by RIAJ. As of July 8, 2009, it has sold more than 150,000 copies. It was the 76th best-selling album in Japan in 2009.
The album release tour, named "<hikari>", began on July 14, 2009 and was attended by around 70,000 people in 26 locations across Japan.