The power of red plastic on Wii sales in Japan is nothing compared to the promotional power of the Monster Hunter series. How else can we explain the PlayStation Portable more than doubling its sales this week overseas?

It’s a banner week for the PlayStation Portable in Japan as the PSP enjoys chart topping sales and its smaller, digital download only cousin, the PSPgo, manages to not be in last place for a second week.

Sony’s recent slashing of the PSPgo’s price worldwide has had a noticeable effect on sales of the download-only device, at least in Japan. The regularly triple-digit selling PSPgo just had one of its best weeks ever overseas.

Sales of Sony’s PlayStation Portable may be way down – just like sales of the Nintendo DS – but the rival handhelds managed to carve out small victories in Japan this week.

While Pokemon Black and White may still be the hottest thing going in Japan right now, with Kirby’s Epic Yarn only slightly cooler, PlayStation hardware is still doing just fine in Japan.

Nintendo wins the biggest slice of the pie in this week’s hardware battle in Japan, thanks to still strong sales of Pokemon Black and White. But the PSP wasn’t too far behind, thanks to K-On!

Another week of outstanding sales for Pokemon Black & White, another week of total Nintendo DS dominance in Japan.