Should I invest in GBP to JPY Currency Pair?" "Should I trade GBP/JPY pair today?" According to our Forecast System, GBP to JPY Forex pair is a bad long-term (1-year) investment*. "British Pound Sterling / Japanese Yen" exchange rate predictions are updated every 5 minutes with latest Forex (Foreign Exchange) rates by smart technical market analysis. Q&A about GBP to JPY Fx forecast.