Board Thread:Monster Discussions/@comment-26335203-20150817093435/@comment-26899911-20150817201807

Are you saying that someone told you that Toho created this manga?

Here's a link about the manga and proving that it is in fact a doujinshi:

http://www.tinami.com/view/352370

伝説の同人誌. どうだ！このクライマックス

-Densetsu no dojin shi.

It translates to doujinshi

This is a Japanese website. And Japanese site are the most reliable sources of information when it comes to Godzilla info.