After previous incarnations of the Nissan GT-R ran away with successive JGTC titles, Japan's GT Association decided to inflict "success ballast" on race winners in an attempt to level the playing field (i.e give Toyota and Honda a chance).
As the current GT-R race car is built to 2009 Super GT specifications, the GT-A handed it a weight penalty of 50kgs added right from the start of the season. After winning Round 1 in Suzuka car number 23 had to carry an additional 50kgs at Round 2 in Sugo, which it promptly won anyway. Then thanks to also setting numerous fastest laps and other speeding offenses it was deemed that Benoit Treluyer and Satoshi Motoyama's ride would have to port an massive 200ks (440lbs) of ballast at this weekend's race at Fuji Speedway.
Autoblog Super GT - Round 3
(if you can take your eyes off the racequeens you may see the Cusco Impreza!)