The digital single "I.V." was released on January 23, 2008, marking X Japan's first new music in 11 years. The song was featured in the end credits of the Saw IV film.
- The song was recorded with their reunion lineup, which included former Luna Sea guitarist Sugizo on guitar and violin.
- The single was released by BMG Rights Management (US) LLC.
- The song was co-written by Yoshiki and hide.
X Japan is a visual kei rock band from Tokyo, Japan, formed in 1982. They are known for their orchestral power ballads and heavy metal songs. Carnegie Hall staged a concert of their music in 2017. Their 2008 single "I.V." was their first release in over a decade.
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