Samurai Warriors: Spirit of Sanada, known in Japan as Sengoku Musou ~Sanada Maru~ , is a hack and slash game by Koei Tecmo through their development subsidiary, Omega Force. It is a spin-off of Samurai Warriors 4, part of the Samurai Warriors series, which in turn is a spin-off of the long-running Dynasty Warriors series, both of which are also hack and slash games. It was released on November 23, 2016 in Japan to coincide with the airing of the climax episode of the ongoing NHK TV taiga drama Sanada Maru. It was released in North America and Europe in 2017.

Sanada Masayuki was a Japanese Sengoku period lord and daimyō. He was the head of Sanada clan, a regional house of Shinano Province, which became a vassal of the Takeda clan of Kai Province. Along with his father and brothers, Masayuki served the Takeda clan during its heyday, when it was led by Takeda Shingen. After its downfall, Masayuki took the lead of his clan and, despite little power, he managed to establish himself as an independent daimyō under the Toyotomi regime through skillful political maneuvers amidst the powerful Tokugawa, Hojō and Uesugi clans.