Types of manga

Manga-comics are divided into many different types. These are:

Doujinshi
This type of manga roughly means "same stuff, different people." Doujinshi is unofficial manga that is made and produced by fans of an original series.

Gekiga
Gekiga means "dramatic pictures". This type of manga is more experimental or literary.

Hentai
This manga is more sexually hardcore manga. Hentai is Japanese for "perverted or perversion". (adult content)

Redikomi
Redikomi is manga aimed at adult women. (adult content)

Seijin
Seijin is the exact same thing as Redikomi accept for males. (adult content)

Shojo
Shojo is manga aimed females up to the age 18. These series tend to focus on romance from a young female's point of view.

Shonen
This is almost the same as shojo accept it is mostly action, sports or romance for males up to age 18.

Kodomo
This kind of manga is for little children that are just learning to read.

Shojo-ai / Yuri
This manga is based on female/female romantic relationships.

Shonen-ai / Yaoi
This manga is the same as Shojo-ai / Yuri accept it's boy/boy relationships.