That my friend, is the amazing thing I've been anxiously awaiting for some grand time now. Thanks a million for this knowledge.
Hey Vraggeol, as far as I'm aware, no a proper english translation patch or similar thing exist. That's both official and non-official btw. Sorry about that, but you could, however, read the scripts online so you can keep up with the story and recognise the item drops and so on. I would recommend using the online script though. I had just finished searching online throughout the evening infact and thats where my answer came from, but I could be wrong so don't take me to word. Once again, sorry if I couldn't have been of more assistance but I hope I helped even a bit.
And yes, the JAP version has creatures with roughly 33% more HP and money drops of around 33% less and so on. You will enjoy it.