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The first novel was published by Kodansha on December 2 , 2011 under their imprint Kodansha Ranobe Bunko , and five volumes have been released as of November 30 , 2012 .
 Kodansha, Kodansha
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kodansha, Kodansha