'Sado' can refer to:
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Sado, Niigata, a city (佐渡市 ''Sado-shi'') and an island (佐渡島 ''Sadogashima'') of Niigata Prefecture, Japan.
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Sado province (佐渡国 ''Sado no kuni''), a former province of Japan located on the island.
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Japanese tea ceremony (茶道 ''Sadō'').
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Sado River, a major river in Portugal.
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Prince Sado, a Joseon Korean crown prince who never acceded.
★ Sado (book), a short story by
Osamu Dazai.
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Sado Yasutora, a fictional character in the anime and manga series ''Bleach''.
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Sadomasochism.