Yoshiyuki Nishi (西 義之, Nishi Yoshiyuki; born December 27, 1976) is a Japanese manga artist best known for his work, Muhyo and Roji's Bureau of Supernatural Investigation. He is the former assistant of Takeshi Obata. Born and raised in Hachioji, Tokyo.
Source: “Yoshiyuki Nishi”, English Wikipedia (CC BY-SA 4.0), excerpt