You may want to wait for a couple of months more, there is talk that there will be a price drop during the launch for the rest of the world in March. Honestly, the launch games don't look that impressive compared to the main titles in the works, so not much point buying now I think.
Because of the shortage in Japan,I've heard that prices over there have jumped to 60,000+ yen for the 20Gb model and 80,000+ yen for the 60Gb on Amazon Japan.
If you have been following gaming news, it's actually 1 for the Playstation and 0 for Xbox. The Xbox launch in Japan was really lacklustre and Japan is probably one of the largest, if not the largest share of the international gaming console market.