Kodomomuke manga are targeted towards the demographic of young children. They first became popular as part of children's magazines in the early 1900s in an effort to increase literacy in children. They are usually moralistic and cute. Some popular types of kodomomuke include manga for young girls like Hello Kitty, manga with toy and video game tie-ins (usually for young boys), adaptations of famous western stories, and adaptations of famous Japanese works.
Doraemon by Fujio Fujiko
Gekiga manga are targeted towards a general adult audience and usually contain more serious stories for mature readers. They emerged during the 1950s and 1960s, after the popularization of children's manga. They typically feature dramatic stories that are more realistic. There was an art group that formed in 1959, the Gekiga Kōbō that wrote an artistic manifesto that they distributed to the press, and they had a lasting influence. Garo, a magazine for alternative manga founded in 1964, grew the interest of college students in gekiga and more anthology magazines followed shortly thereafter.
Lone Wolf and Cub by Kazuo Koike and Goseki Kojima