Gran Turismo 6 has been in development since GT5 shipped, says Kazunori Yamauchi

[Update: looks likeĀ GT 6 will be released on PS3, according to a Sony boss.]

Polyphony Digital boss Kazunori Yamauchi revealed at the China Joy gaming event that Gran Turismo 6′s development began almost immediately after Gran Turismo 5 was released.

Originally reported by AndriaSang, Yamauchi suggested to few people’s surprise that GT6 will be a next-gen proposition, saying “We’re always aiming for the latest technology and the latest expression.”

The Polyphony head was less forthcoming about a PS Vita iteration of GT, refusing to confirm or deny that such a game was in development: “If we were to make it, we’d like to make use of the ability to play anywhere and the ability to use 3G at any time.”

With the event being hosted in China, the line of questioning turned to the Shanghai circuit, and the possibility of its inclusion in GT6. Yamauchi responded by informing that he’d visited the circuit recently and was scoping it out.

There’s also a possibility than Gran Turismo 6 will have mod support, allowing players to create their own content beyond GT5′s track maker into the realm of new cars: “If we can find a good balance, we’d like to increase the areas where users can make modifications,” said Yamauchi.

Gran Turismo 5′s post-release content stream has been strong, and it’s not about to stop any time soon. The GT5: Academy Edition will add new cars and tracks when it arrives on September 26th.