X, also known as X TV, is a Japanese anime television series based on Clamp's manga series of the same name. 

It was produced by Madhouse and directed by Yoshiaki Kawajiri. Its twenty-four episodes were broadcast in Japan on WOWOW from October 2001 to March 2002. The story takes place at the end of the days, in the year 1999. It follows Kamui Shiro, a young esper who returns home to Tokyo after a six-year absence to face his destiny as the one who will determine humanity's fate. There, he discovers two organizations who want to take him as well as another person who shares Kamui's same talent.