Gera Gera Manga Kissaten
Gera Gera runs a large chain of manga kissa’s spread all over Japan. The cute frog icon is unmissable. Gera Gera’s shops are equipped with everything you expect from a manga kissa: booths and seat with or without computers, drink service, lots of movies, games and of course manga comics. Prices vary per location.
Photo courtesy of plus.google.com
See a list of their locations here: http://www.geragera.co.jp/store/index.html (in Japanese)