Cels Forum

As there is misunderstanding a little. 

"Hentai" is the word that scorns the person fundamentally.
Accordingly, it will be handled with hostile, if You speak this word to the Japanese. 
Adult material is called "ero" simply. 

"Doujinshi" shows the book, all that are made by the hobby.
Even the novel and poem are included, although many are manga.
There are an information magazine and sports guide etc. in addition. 
In short, the one that does not pass the publishing company is all "Doujinshi" ones. 

Thanks,
master.