Torii clan (鳥居氏 Torii-shi) was a samurai family of the late Sengoku and Edo periods of Japanese history. Loyal retainers of the Tokugawa clan since the late 16th century, the Torii are perhaps most famous for the bravery and valor of Torii Sune'emon, who was crucified by Takeda Katsuyori at the 1575 siege of Nagashino castle, and for Torii Mototada, whose Seppuku is one of the most celebrated in the whole thousand years of Samurai's history.
The family was originally granted the fief of Yahagi in Shimōsa Province in 1590. It was worth 40,000 koku. Following the establishment of the Tokugawa shogunate, in 1606 the Torii were given Iwakidaira Domain in Mutsu Province, worth 100,000 koku. Then, in 1622 they moved once more to Yamagata in Dewa Province, with an annual income of 260,000 koku. Torii Tadatsune died without an heir in 1636, and his fief thus reverted to the shogunate; his brother Torii Tadaharu was given Takatō in Shinano province (30,000 koku).