I've chosen the AUD/JPY pair for this example, but we could have chosen any of the yen currency combinations because they all correlate quite closely, owing to the Japanese yen's dominance over the pairs.
As a result, if you get the yen direction right, you'll be spoiled for options. Furthermore, the FXCM yen index provides the ideal chart for revealing yen strength and weakness against the four major currencies, so take advantage of it!