Ginga Densetsu Riki(銀牙伝説リキ, lit. Silver Fang Legend Riki) is a Japanese manga created by Yoshihiro Takahashi in the Ginga Densetsu Weed magazine Weed World. It is the prequel of both Ginga Nagareboshi Gin and Ginga Densetsu Weed. The manga tells the story of Riki, Gin's father and leader of the pack of dogs in Ginga Nagareboshi Gin. It primarily explains how he became strong and courageous, as well as his relationship with his parents. It also shows much about his father, Shiro, and of his death wherein afterward, Riki seeks revenge.