Kingdom Hearts coded is the fourth title in the Kingdom Hearts series. Released in chapter form, the title was only available in Japan, and is a direct sequel to Kingdom Hearts II. It covers Jiminy Cricket and King Mickey's efforts to uncover the truth of a message found in Jiminy's Journal by working with a digital version of Sora inside the journal.
The game was announced at Tokyo Game Show 2007 on September 21, 2007, alongside Kingdom Hearts 358/2 Days and Kingdom Hearts Birth by Sleep. Kingdom Hearts coded initially released for the Docomo Prime Series-P-01A Panasonic mobile phone on November 8, 2008.