The PS3 sold 25,531 units for the week ending January 14.
Nintendo Wii sales were estimated at 93,708 units, the second worst week since it sold just over 85,000 units immediately after launch.
The news wasn't impressive for Microsoft either, with the Xbox 360 managing just over 9,000 units sold in the same period.
Sony recently announced it has shipped over a million units of the PS3 to Japanese retailers.
Looking at sales data for software, Wii Sports is the number one title in the region, selling over 61,000 units. Resistance: Fall of Man is the highest ranking PS3 title in the charts at number 40, while there are no Xbox 360 games in the top fifty at all.