Rei Hiroe is a Japanese manga artist, best known for his manga Black Lagoon. When he is working on doujin comics, he goes by the name Red Bear. Hiroe's manga were originally published by Kadokawa Shoten in the 1990s, but none were complete. As a response, Hiroe transferred to Shogakukan in the early 2000s, where all of his manga released before Black Lagoon were republished and re-released.