Manga (read mangga) are japanese comic, pepople are make manga usually call by Mangka.
Manga has some genre here is:

DEMOGRAPHIC

.Shonen – (japanese terms for boys) aimed at young males. The story often centers around fighting and action and is closely tied to the action, adventure, and martial art genres.
Ex: Naruto, Bleach, One piece

.Shoujo – (japanese for girls) generally target girls. The story often centers around young love and is closely tied to romance and drama genres.
Ex: Fruits Basket, Card Captor Sakura

.Seinen – (japanese for man) meant for more mature male audience.
Ex: Elfen Lied, Cowboy Bebop

.Josei – (japanese for women) target more mature females. Unlike shoujo, romance is more realistic and less idealized. The story telling is more explicit and mature.
Ex: Honey and Clover, Nana

THEMATIC

.Mecha – center around robots. Usually big and deadly variety.
Ex: Gundam Series, Code Geass

.Harem – is a genre which focuses on a male character surrounded by the romance of multiple female characters.
Ex: Ranma 1/2, Love Hina

.Reverse Harem – reverses the gender balance in harem, where a female character is romantically involved with many male characters.
Ex: Ouran High School Host Club

.Gender Bender – centers around the switching typical girl/boy roles, clothes, or even bodies!
Ex: Hana Kimi

.Moe – Feature characters with perky, cute, weak, or naive behavior.
Ex: Melancholy of Haruhi Suzumiya, Shakugan no Shana

.Ecchi – a genre denoting sexy content, sexual humor, and a healthy dose of ‘fan service’. It does not usually involve nudity.
Ex: Ichigo 100%, To-love-ru

.Shoujo-Ai or Yuri – is japanese for ‘girl love’. These focus on love and romance between female characters. Yuri is like shoujo-ai, but sometimes it involves older characters or explicit sexual activity.
Ex: Revolutionary Girl Utena

.Shonen-ai – is japanese for ‘boy love’. These focus on love and romance between male characters. The term ‘shonen-ai’ is being phased out in japan due to its other meaning of ‘pederasty’.
Ex: Gakuen Heaven, Gravitation

.Yaoi – is like ‘shonen-ai’ but often involves older characters and explicit sexual activity.
Ex: Junjou Romantica, Kyo Kara Maoh!
.Hentai – literally means ‘strange behavior’ and is often associated with perverseness. This term is synonymous to pornography or erotica, as hentai content specifically consists of such.
Ex: La Blue Girl, Bible Black

.Lolicon – sexualization of under-aged female characters.
Ex: Kodomo no Jikan

.Shotacon – sexualization of under-aged male characters.
Ex: Papa to Kiss in the Dark