Interesting. Looked this up and like XS, the lower end 20GB PS3 received the price drop prior to launch.
“The price cut affects the basic 20-gigabytePlayStation 3 model. Sony is leaving the pricing of the 60-gigabyte up to Japanese retailers.”
PS3 overall did not have a spectacular launch in Japan as PS2 was still incredibly popular and outsold PS3 for some time after launch. Xbox….well….we all already know how this is going to turn out.