It looks like the 360 is off to a slow start. I wonder if this is due to Japanese gamers being completely entrenched with Sony (and Nintendo), or if Japanese gamers really just do not like the games that are available for the 360. Or maybe they really do want to wait for the jiggle goodness of DOA4.
Should be interesting to watch. [Source Xbox 360 Gets a Soft Start in Japan and Microsoft Xbox 360 Japan sales slow:study]
