Manga refers explicitly to printed comics in a specific style originating in (but not exclusive to) Japan. Although science fiction and fantasy manga is on-topic, the Anime & Manga Stack Exchange site may be able to provide more expertise. Use to either identify the media on a [story-identification] question or disambiguate works where the tag covers the manga and its form in other media. Also covers Chinese *manhua* and Korean *manhwa*.
Manga refers to printed comics in a style originating in (but not exclusive to) Japan. Also covers Chinese manhua and Korean manhwa.
Manga are available in a wide range of topics and target audiences, but for this site any questions on manga should be specific to titles that incorporate science fiction or fantasy themes.
Many anime titles originated as manga.