Gran Turismo 5, the lastest PS3 "system seller" in Japan has followed in the footsteps of Gundam Musou, Hot Shots Golf 5 and many others by setting a very poor week 1 sales of only 90,000 units. If sales are to follow other PS3 titles expect a large dropoff in the next few weeks and the game may struggle to reach even 250,000!!
http://digg.com/gaming_news/Gran_Turismo_5_flops_in_Japan