Japanese

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For pronunciation and definitions of あうしう – see the following entry.
奥州おうしゅう
[proper noun] Mutsu Province, an old province of Japan, made up of the present-day prefectures of Fukushima, Miyagi, Iwate and Aomori, and the municipalities of Kazuno and Kosaka in Akita Prefecture
(This term, あうしう (ausiu), is a historical kana spelling of the above term.)