"I'll Kill You" is the debut single by Japanese heavy metal band X Japan, then named X, released in June 1985.

[2] The cover art notoriously features numerous photographs of dead bodies taken during the Vietnam War.

A different recording of the B-side, "Break the Darkness", was included on the sampler Heavy Metal Force III in November 1985.

[3] While a re-recording of the title track was later featured on the band's first album, Vanishing Vision.

"I'll Kill You" was covered by French symphonic black metal band Anorexia Nervosa as a bonus track for the Japanese edition of their 2004 album Redemption Process and later included on their 2005 The September E.P.