Kōsei Ono

is a Japanese film critic, cartoon critic, comic translator and overseas comic / animation researcher. Ono is the leading authority on the publication, research and introduction of overseas comics (gaikoku manga) in Japan. From 1963 to 1974 he worked for NHK. He is a visiting professor in the Asia Department of Kokushikan University, a board member of the Japan Society for Studies in Manga and Comic Art, and a member of ASIFA JAPAN, the Japan Cartoonists Association, and the Japan Science Fiction Writer's Club.

Life Ono was born in Setagaya, Tokyo. His father was the mangaka . In 1970 he partnered with Ryoichi Ikegami on writing the manga adaptation of Spider-Man for Shonen Magazine. Ono wrote a number of books about comics, such as and , and has translated several American comic book and graphic novel titles to Japanese, such as Art Speigelman's Maus, Winsor McCay's Little Nemo in Slumberland, Jeff Smith's Bone and Joe Sacco's Palestine.

The character Kosei Ono in Shogun Warriors is named after him. He was visiting Marvel's NY offices while it was being produced and they decided to honor him with the character name.

In 2006, Ono was awarded the 10th Tezuka Osamu Cultural Prize Special Award.