Japanese comic books. A high proportion of
anime are adapted from these, so many of the
Anime Tropes not directly related to animation got their start here. Sometimes, an existing anime series gets a manga adaptation; see
Anime First for examples. You generally read them right to left, unless the manga was flipped during its English printing, which rarely happens these days, or the mangaka decided to write it left-to-right for some reason, which happens even more rarely.
Korean-made comic books (called
manhwa), however, are generally read from left to right. Some manga scanlantion sites have started showcasing a few manhwa, leading to some confusion in reading order when readers assume them to be Japanese manga. Chinese comic books are known as
manhua, and read from right-to-left like manga.
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