Hiroyuki Asada (浅田弘幸 Asada Hiroyuki) is a Japanese mangaka. His most known series are I'll and Tegami Bachi. All of Asada's manga were serialized in the monthly shōnen anthology Monthly Shōnen Jump (which has since been discontinued; Tegami Bachi now appears in its replacement Jump Square). He made his debut in 1986. He acquired a fanbase with Mint: Sleeping Rabbit, Renka by degrees, and his popularity improved with I'll. He also worked on the character design of the 2019 anime adaptation of Tezuka's classic Dororo. In his personal life, he is part of a unit with Shou Tajima (best known for Psych) and Takeshi Obata (best known for Hikaru no Go and Death Note), and his creation activity with "AQUARIOS 3".