May 27th release, 6,300 Yen (inclusive of tax).
The date specified above is for the Japanese market. Fans in China will get it 8 days earlier, on the 19th. On top of that, two types of special prizes will be given for the China release version as well - the special "Serenity" (和) style sticker mentioned in this previous posting and a clear folder, obtainable from the hobby store counter.
Images are from Himitsu.