Kingdom Hearts (キングダム ハーツ, Kingudamu Hātsu) is a series of action role-playing games developed and published by Square Enix (originally by Square). It is a collaboration between Disney Interactive and Square Enix and is under the direction of Tetsuya Nomura, a longtime Square Enix character designer.
Kingdom Hearts is a crossover of various Disney properties based in a fictional universe. The series centers on the main character, Sora, and his journey and experiences with various Disney, Square Enix and Pixar characters. The heroes of the series clash against the multiple incarnations of the primary antagonist, Xehanort, throughout the series.
The manga was originally serialized in Japan by Square Enix's Monthly Shōnen Gangan and eventually released in tankōbon format. The first tankōbon was released in Japan in October 2003. The manga was released in the US by Tokyopop two years later in October 2005.