What's your goal with the laptop? Play FFXIV? General gaming? Lighter gaming? Internet?
As someone who's used a few "gaming laptops", in all honesty I would always recommend you stay away from a laptop for gaming at all costs unless you seriously have no other way, there's just too many downsides:
1)
Cost. You'll pay through the nose for something a desktop could do for a fraction of the price.
2)
Bulk. Powerful laptops are really really heavy, I had to carry one over my shoulder to and from university for 2 years. A gaming laptop isn't exactly as "portable" as you'd think. So why is it a laptop exactly?
3)
Heat. They get hot, really really hot. You're not going to be using it in your lap nor on your bed because it'll overheat from you blocking the vents and you're going to get burns on your legs. Despite being a "laptop" it's going to be permanently affixed to a desk somewhere.
4)
Life. While a good desktop can last over 5 years, a laptop has a much shorter lifespan. It'll be barely 1-2 years before it'll feel old and outdated. Heck some stuff just wont play as good as on a desktop right off the bat and it'll be all downhill from there. This wouldn't be a huge deal on it's own, but at the price you pay you'd expect longer.
If playing the latest 3D games isn't what you're after, you'll do yourself a big favor by getting a not-gaming specific laptop. There's nothing to stop you getting a decent/powerful normal laptop. And heck, if your goals are simply internet and occasional work, you might be better off with a decent netbook instead. And if you can't take a desktop to Japan, perhaps you could buy one once you're there, I have no idea how much that'd cost.
If playing stuff like FFXIV is your goal, and there's really no way other than a laptop, then so be it. But I just wanted to make sure you consider any alternatives first.
But to answer your question, since I've sworn off the things I really don't know how good that laptop is. The graphics card is
usually what holds laptops back, so I would consider looking around all the various laptops paying attention only to what graphics card it has and then weigh the other specs in later.
The tried and true method I've found so far for seeing how well games run on various laptops is to punch the name of the chip (in this case: 6770M) into Youtube. There will almost always be someone showing off Crysis or something on it:
http://www.youtube.com/watch?v=7QMA8GTA2_s