If you need to wear a necktie every day, especially in the sizzling summer, maybe you are going to be interesting in this Thankno USB necktie fan. The fan can be powered through plugging the tie into the computer and keep you cool when doing the text-typing work. The price US$25 (2,980 yen) of this tie is not so expensive, but make sure you unplug it from the computer when you are setting to get up, to prevent dropping your laptop. 
Links: Plastic Bamboo & Slash Gear
