Takamatsu den - the nine systems Ninjutsu school
Takamatsu den, (טקמצו דן) is the name for all the nine Ryū, taught by Takamatzu to his student Hatzumi Masaaki.
These Nine systems are comprised of five bushi originated Koryu: Koto ryu, Gyokko ryu, Fudo Ryu, Kukishinden ryu and Takagi Yoshin Ryu, with at least one Ninjutsu system: Togakure ryu
Three other Ninjutsu systems, in the Takamatsuden schools, are learned sporadically and not all their Kata are explored: Gikan-ryū Koppō jutsu (義鑑流骨法術), Gyokushin-ryū Ninpō (玉心流忍法) and Kumogakure-ryū Ninpō (雲隠流忍法).