Fuma Kotaro( 風魔小太郎)
...is the name of the head of Fuma Ninja. Fuma Ninja is Ninja organization which served Late Hojo clan. The famous Fuma Kotaro is the 5th Kotaro who worked for Hojo Ujiyasu and Ujinao. During the battle against Takeda Katsuyori, he use his ninjutsu to confuse Takeda and bring Hojo victory. After the fall of Hojo, Kotaro and his ninja became brigands and killed by Tokugawa in 1603.
The story of Fuma Kotaro and Fuma ninja is fiction written in Edo period, but there is his motif. His name is Fuma dewanokami (風間出羽守). He was spy of Hojo clan and from Kazama Valley.
Ninokuruwa Isuke (二曲輪猪助) and Tobikato(飛び加藤) are also Fuma Ninja.