jlpi, you are right that in strategy builder the swaps are in GBP. and actually in demo platform we can see that GBPJPY swap is +25.25 GBP.
But, how I understand the strategy builder is Introducing Broker of Forex.com. So I just do not understand how there swaps can be bigger then Forex.com. In recent days I talked with guy from Forex.com and he was surprised as well.
But i can write to strategy builder .. maybe they will explain the situation.