Manga: Japanese or Japanese-influenced comics and graphic novels. Usually printed in black-and-white. See goodreads lists.
Light novel: (or Ranobe) is a style of Japanese novel typically not more than 40-50,000 words long, usually published in bunkobon size, and often illustrated. The text is often serialized in anthology magazines prior to collection in book form. See goodreads lists.
publishers: Vertical Comics, Kodansha Comics, Yen Press