My thoughts on this thread....
1) Euro and Dollar are gaining vs the Yen because there is a lot of sudden optimism in the Fiscal Cliff and Spain's relinquishing of sovereignty to the Eurobank. Japanese quantative easing has yet to happen, and it will be interesting to see what happens, and how markets will take a government takeover of a central bank.
I would expect bad things of Japan's megaprinting strategy... but quite honestly I kind of hope Abe gets his way, because I know that if he doesn't, the US has a high chance of being the first to try that strategy. (And already is on a smaller scale.)
2) I would be totally bearish on Nintendo and Sony now, though not due to currency concerns so much as fundamental problems in their businesses. Sony's being pretty well covered as it's primary businesses being a mess due to a shifting global market but not shifting enough local market. And Nintendo, it, just isn't going to be the glory days of the Wii.
3) If you do plan to buy Sony.... don't plan to cash out quick for some money. It's more of a "long haul" investment.