Tamiya manufactures most of their kits in Philippines, and obviously Singapore is closer, that's why you got it early.
A while ago, Canada got a hold of F60 kits before Japan did, and I'm guessing the Canadian distributor used an air service instead of surface.
Looks like a descent kit. I guess we can't expect for the level of details like in their 300ZX or NSX kits with complete engine details. Still, it's certainly better than no engine (good thing, it's not molded with the body like in the GT-R kit), and most importantly it's Aston!