#chikae ide

According to this article, the manga "Ojousan Tantei Series" (1958~1961) by Imamura Tsutomu & Imamura Yoko (father and daughter) used Hepburn as inspiration for the fashion worn by the main character.

The article also names Mizuno Hideko as a shoujo mangaka inspired by Hepburn, who made a manga adaptation of a Roman Holiday in 1966. According to this other blog, Mizuno's adaptation (originally published in an issue of Ribbon Magazine) didn't face copyright issues on release day but as time passed and copyrights became more strict, it was never printed again. That is, until 2007, when the copyright for the film expired and the manga adaptation was published in its own copy (as shown below).

And of course I can't not mention that it is also one of Mizuno Hideko's manga adaptations, this time of Sabrina under the title "Suteki na Cola", that is cited on Wikipedia as the first shoujo romcom.

There are other shoujo mangaka who were clearly inspired by Hepburn like Tani Yukiko (most obvious in her fashion illustrations and her various illustrations of Hepburn) and Chikae Ide who made a manga adaptation of Green Mansions following the release of the movie, which starred Hepburn (and Tani Yukiko made the cover for that adaptation..!)