Tadazane may refer to:
Ōkubo Tadazane (1782–1837), the 7th daimyō of Odawara Domain in Sagami Province in mid-Edo period Japan Fujiwara no Tadazane (1078–1162), Japanese noble and the grandson of Fujiwara no Morozane Ogasawara Tadazane (1596–1667), Japanese daimyō of the early Edo Period, the son of Ogasawara Hidemasa
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