Japanese comics are printed in magazines chapter by chapter, with one manga chapter per magazine. But several comics can be published in one magazine.
What is the main difference between manga and Western comics?
The first thing that catches your eye is the color palette. Almost all manga are black and white, and even with modern printing capabilities the tradition is not broken.
History of Manga
Like any art form, manga has a history, but there is no consensus on how and when manga first appeared.