In pictures: Tokyo's gadget heaven

		Stealth cooling Hiroyasu Yamamitsu, an Akihabara store owner, is demonstrating the USB neck cooler. The fan is powered by your computer and hidden in the tie. You put it round your neck and slip the knot over the fan. It blows cold air over your neck and no-one else is any the wiser. He came up with the idea for the product himself, he says. From time to time he holds brainstorming sessions where staff in his shops try to come up with new gizmos to attract customers.