Actually,
Even though Sony is affected by USD/YEN exchange rate, I know that they are somewhat hedging themselves against the fluctuations in USD/YEN. edit: Actually according to Kaz in the below interview, a weaker Yen is a disadvantage to Sony.
EUR/YEN is much more important for Sony.
Kaz also underlined this in an interview with CNBC at the D11 Conference, as below (around 07:55):







