On January 5th, a large amount of the production material of Katanagatari
was leaked to the file sharing. The data includes the character designs, the draft storyboards up to episode 8, and the scenarios up to episode 10.
Leaked OP animation (Youtube)
Judging from the ID of the FTP, the source of the leak is probably one of the staff of White Fox, Koresawa Hideyuki
Story by nextday
Updated on January 7th
White Fox admitted that their FTP server was hacked and concealed data was stolen. They apologized to the companies involved and the fans. They will investigate the case with Tokyo Metropolitan Police.
Source: White Fox official website