The series 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.
[1][2] The chapters have been collected in a total of eighteen tankōbon volumes with the first one released on July 29, 1992, and the eighteenth on September 17, 2002.
[8] The North American version of the manga, retitled X/1999, was serialized in Viz Media's Animerica Extra and was released in individual volumes.
[10] By April 2010, manga editor Carl Gustav Horn Carl from Dark Horse Comics stated they would not license the series until it finished in Japan;[11] Viz Media still maintains the licence to the English edition of X.
In March 2011, Viz Media announced they would release an "omnibus" edition of the series which collects three volumes in one.