I also sell cameras from Japan from time to time. I also sell in USD because it has been the trend for so long everyone can grasp the conversion to their own currency quickly. I just have to me more prudent what I buy to resell. In the end, I take everything in stride. People in Japan complain about the yen to US dollar imbalance, but the reality is that Japan had it good for a long time. The Japan took full advantage of a weak yen against the dollar in the 70s, 80s and 90s. Now, I think they have nothing to really complain about. What goes around comes around. Do not feel to bad though because Japanese companies can buy overseas companies or commodities like oil and iron ore due to the high yen at cut rate prices. The real sad thing that American companies have not been able to gain a competitive edge exporting American goods even though their dollar is at all time low. The lower the dollar goes I think it better for American businesses! American exports are cheaper, if they have a competitive product to sell. Also, more tourism from foreigners. Do not discount the power of tourism dollars.
The reality, I think, is that world is re-aligning itself. American is not what is once once and China and India are finding their true place in the new world order.