Heh, GeekSnack.
They have that mini bag of 12 of green tea kitkats on sale here for like 6 bucks a baggie
Just throwing it out, because I'm a foodie, and I come across these super often. Google those that you dont know
Royce Chocolate (nama chocolates are no-go due to shipping conditions, but it's the best)
Caramel Corn
RitterSport Chocolates
Shiroi Koibito
Pocky (and Pejoy)
Hi-chew (those made in Japan ones....not those that are made in Taiwan, they taste very different)
Puccho
And this thing called Tokyo Banana, almost unattainable outside Japan due to the expiry date
And my friends always swear by this little crispy thingy called fish muruku.........
P.S KitKats come in different types, there's the regional specialities in Japan with nearly 20-30 flavours........including the Kyoto Green Tea one (tastes totally different from the normal green tea ones, and costs more too)
EDIT: That's what I can throw out of the top of my head