One of the more interesting items at the Matsumoto craft fair. Looks like a hard to steal wallet to me.
UPDATE: Thank you to Brynak who found this guy's website! The man's name is Hirotoshi Itoh. You can find him at the site below.
For all of the English readers out there, the "English" link will take you to a well done page with info about his work and several images. There are also more images available if you click on the second link "自遊石" and then "gallery" on the resulting page. Anyone interested should check out the webshop because this guy is, frankly, awesome. Enjoy!