Amazon.co.jp has announced a release date of "April 22, 2013" for the six volume of the Kingdom Hearts II manga. While this has not yet been confirmed by Square Enix, it is is likely to be true since chapter 38 was released last year on October 12, 2012 in Monthly Shonen Gangan. You can read chapter 38 below, in our gallery thanks to taime, catmaster0116 and corfidbizna.
Manga → Kingdom Hearts II → Chapter 38