He was speaking via his Twitter account (@yosp), and clarified Cross-Buy's status as being "not decided for Japan yet."
Sony announced a brand name for its Cross-Buy promotion along with three further supported titles at the Gamescom conference: party punch-up PlayStation All-Stars Battle Royale, plus action adventures Sly Cooper: Thieves in Time and Ratchet & Clank: Full Frontal Assault (aka QForce).
Time-trial racer Motorstorm RC and clever audio action mashup Sound Shapes already support the feature, while Need for Speed: Most Wanted's admission to Cross-Buy is said to be a possibility, however remote.
Four other schemes tie into Cross-Buy. Cross-Play lets PS3 and Vita owners hop into the same multiplayer game, Cross-Save allows game progress to be transferred between PS3 and Vita systems, Cross Goods means extra content can be shared between the two, and Cross-Control means the Vita -- with its additional touch screen and camera -- can be used as a PlayStation 3 controller.