WSR in Japan First Week is 87% of SW total

[nuninhuh]

I don't know what is the problem with selling 87% of the console's software in the first week.

According to this site Monster hunter 2G sold 88% of the PSP software in Japan in its launch week.
pokemon diamond and pearl : 79%
GT3 : 86%
MGS4 : 93%
Halo3 : 95%