Ninjutsu organizations

The is an international martial arts organization based in Japan and headed by Masaaki Hatsumi. The combat system taught by this organization comprises nine separate ryūha, or schools, which are collectively referred to as Bujinkan Budō Taijutsu. The Bujinkan is most commonly associated with ninjutsu. However, Masaaki Hatsumi uses the term Budo (meaning martial way) as he says the ryūha are descended from historical samurai schools that teach samurai martial tactics and ninjutsu schools that teach ninja tactics.

is an umbrella term for ninjutsu traditions that come from the Iga region, according to Japanese legend. It became one of the two most well-known ninja traditions in Japan. The Iga-ryū traditions originated in the Iga Province in the area around the towns of Iga, Ueno, and Nabari (modern Iga City and Nabari City in Mie Prefecture). Iga-mono is a synonym for Iga ninja.

is a historical tradition of ninjutsu known as the "School of the Hidden Door", allegedly founded during the Oho period (1161–1162) by ( ), who learned his original fighting techniques from a Chinese monk named Kain Dōshi. However, the history and early lineage of Togakure-ryū may be impossible to verify due to the antiquity of the time period and its claimed historicity has been disputed by Watatani Kiyoshi, writer for the Bugei Ryūha Daijiten. After Togakure, the title of Sōke (head of school) was recorded by Toda Shinryuken Masamitsu to have been passed down through other practitioners that

Kōga-ryū (甲賀流, "School of Kōga") is an umbrella term for a set of traditions of ninjutsu that originated from the region of Kōga (now the city Kōka in Shiga Prefecture). The samurai of Kōga-ryū were known as "Kōga-no-mono", and operated as shinobi throughout Japan's turbulent Sengoku period.