Hi Paul,
What about a set of chisels? I have no idea how much these will cost in Japan, but they have got to be cheaper then over here.
A good middle of the road set are the Umeki-Nomi bevelled chisels, or a bit more expensive are the Orie Nomi Suminagashi range. These will hold their edge up to 4 times longer than the European ones, but they do take slightly longer to sharpen.
If you don't fancy these, then you cannot go wrong with a nice set of Japanese saws? IMHO these are far better than a lot of European ones.
In some countries their products are far cheaper than they are over here. and if this is the case in Japan, then you could pick up some very good deals, on some top of the range goodies, and with these you could go to the top of the gloating league, where it appears Philly has ruled for years.
If you cannot make up your mind, why not buy them both.
I hope this helps.
Cheers
Mike