Sin-Ichi Hiromoto (ヒロモト森一 Hiromoto Shinichi) is the mangaka responsible for Ryūken Gaiden: The Judgement Day and Jagi Gaiden: Flower of Carnage. He was born January 4, 1966 in Kumamoto. He drew the manga adaptation of Return of the Jedi and did the human character and mechanical designs for Pokémon Colosseum and Pokémon XD: Gale of Darkness.