Kodansha
From Transformers Wiki
Kodansha Limited (株式会社講談社, Kabushiki-gaisha Kōdansha) is one of the largest Japanese publishers, headquartered in Bunkyo, Tokyo, founded in 1909. It also has close ties with the Walt Disney Company and is Tokyo Disneyland's official sponsor.
Kodansha published three magazines related to the Transformers franchise: TV Magazine, TV-Kun and the defunct Comic Bom Bom.