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was a Japanese feudal lord of the Azuchi-Momoyama and early Edo periods, who served Tokugawa Ieyasu and played a role in controlling the military in the eastern provinces.
History
thumb|Grave of Torii Tadamasa
The second son of Ieyasu's chief vassal Torii Mototada, when his father died during the Siege of Fushimi Castle, Tadamasa inherited Yahagi Domain in Shimōsa Province, worth 40,000 koku.