Manga Kenkanryu
マンガ 嫌韓流
Kō Bun'yū
and
George Akiyama
, who wrote a manga with anti-Chinese themes
Rhie Won-bok
, a manhwa artist whose work has been accused of antisemitism
Racism in Japan
Zaitokukai
, an anti-Korean organization
https://en.wikipedia.org/wiki/Manga_Kenkanryu