Here are the prizes for TADHack Japan.
Skyway prize will be a Raspberry Pi and WebRTC book that Uchida-san of NTT Advanced Technology translated. You will be able to meet Uchida-san at both TADHack Japan (13-14 February) and the WebRTC Conference Japan (16-17 February).
Telestax prize will be 80,000 yen worth of Amazon gift certificates
(probably split to 1st prize 50,000 yen and 2nd prize 30,000 yen).
RicTelecom (media partner) will provide 10 WebRTC books for some of those attending TADHack Japan.
There are lots of prizes for TADHack Japan, and some cool people to hangout with as you learn, share, code and create with WebRTC