Minamoto no Yoshiie (1039 – 4 August 1106), also known as Hachimantarō, is a Minamoto clan samurai of the late Heian period, and Chinjufu shogun (Commander-in-chief of the defense of the North).

The first son of Minamoto no Yoriyoshi, he proves himself in battle with the Abe clan in the Zenkunen War (Early Nine Years' War) and the Kiyohara clan in the Gosannen War (Later Three Years' War).

Subsequently, he becomes something of a paragon of samurai skill and bravery.

Minamoto no Yoshiie is thus considered the founder of the Minamoto clan's great martial legacy, and is worshiped as a particularly special and powerful ancestor kami of the clan.

As a kami and a legend, he is often called Hachimantarō, "Child of Hachiman, the god of war."