Shipments of Sony's PSP in Japan are lagging, and the PS3 situation is not much better.

According to Bloomberg, Sony spokesman Satoshi Fukuoka recently gave the PSP shipment figures in an phone interview today.

Both systems went on sale in Japan in December 2004, and since then DS figures have proved the system to be more dominant. Sony has shipped five million PlayStation Portable machines in Japan by the end of January, lagging behind the DS by about three to one. Nintendo have themselves shipped roughly 14.4 million DS units in Japan, according to their latest figures.

Japanese researchers Enterbrain have pinned Wii sales in Japan at 1.69 million units as of the 25th of February, compared to 700,747 for PS3. Consumers are most attracted to the Wii's price - half that of the PS3.

The Playstation 3 faced problem after problem when it originally went into production, forcing Sony to lose ground to the Wii in its homeland.