Naitō Masatoyo also known as Naitō Masahide was a Japanese samurai of the Sengoku period. He was known as one of the "Twenty-Four Generals of Takeda Shingen". Masatoyo was the second son of Takeda Nobutora's senior retainer, Kudō Toratoyo. He was first called Kudō Sukenaga. The family's fortunes fell when Toratoyo lost favor with Nobutora and was killed by him.Sukenaga and his brother escaped the Takeda clan and, according to the predominant theory, they wandered around the Kantō region. After Nobutora was exiled by his son Takeda Shingen, Shingen recalled the Kudō brothers, reinstating their lands and permitting the family's restoration. Shingen also formally excused Toratoyo of any wrongdoing and sent a letter of apology and money to the family. Furthermore, the Kudō were given command of 50 cavalry and granted the rank of samurai-taishō.