World of Fantasy is the twelfth studio album by the Japanese electronica band Capsule, released on May 25, 2011, in Japan. The album was originally due for release with the title of "Killer Wave". After the 2011 Tōhoku earthquake occurred on March 11, 2011, Yasutaka Nakata announced that the album's release (which was previously announced as March 23, 2011) was postponed and due for release at an unknown date for cover art rework and renaming. "Killer Wave" was then considered a "working title". This is the only album of the duo with all songs sung by the vocalist Toshiko Koshijima. It is also their first completely English-language album.