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The problem is that CME quotes the JPY/USD rate whereas if you were trading spot the quote is the USD/JPY rate. There's something called CME e-quivalents that converts it the other way round. It's a better idea to trade Euro or British Pound futures, especially if your trading hours are during US hours. They move in the same way as EUR/USD and GBP/USD although there will be a premium or discount if there is an interest rate differential. For Euro futures one pip is equal to $12.50 so if the price moves from 1.3050 to 1.3150 (that move would be a little bit more than the daily average true range) then you would win or lose $1250. British Pound futures are good because it's $5 a pip. The liquidity is reasonable between the London open and the New York close.

FX is especially sensitive to data releases and interest rate meetings but also great for swing trades lasting a few days or weeks.