Saitō Dōsan, Japanese samurai (born 1494)

Saitō Dōsan , also known as Saitō Toshimasa, was a Japanese samurai lord and daimyo during the Sengoku period. He was also known as the "Viper of Mino" for his ruthless tactics. He was appointed Governor of Yamashiro by the Imperial Court. After entering monkhood in his later years, he was also called Saitō Yamashiro-nyudō-no-kami (斎藤山城入道守).