Born in Kyoto in 1972, Odani Motohiko studied sculpture at Tokyo University of the Arts and Music. Since graduating, he's had at least 7 major exhibitions to his name, most recently 'Phantom Limb', which is currently on display at the Mori Art Museum in Japan. The exhibition, which has been up since late November will be coming down this weekend. The exhibition is already scheduled to travel to two more museums, though as far as I know there are no plans for it to leave Japan as of yet.
The sculptures seen below are all part of the current exhibition. Despite my research, I have absolutely no idea how some of these have been created, as their medium is simply listed as "mixed media".