Square will give Japanese fans a chance to experience the English version of Kingdom Hearts when it releases Kingdom Hearts: Final Mix. This updated version of the game will include English voice acting, the English version of the game's theme song, "Simple & Clean", as well as appearances from a number of additional characters, including Sephiroth of Final Fantasy VII fame. Japanese subtitles will be utilized throughout.

Kingdom Hearts is every crossover fanfic's dream, with characters from many Square titles and Disney movies. It is doubtful whether the Final Mix version will be released in North America, seeing as how such a release would be largely redundant.