This is the 187th most frequent Japanese word.
奥州
"奥州" (Ōshū) refers to the historical region of northern Japan, encompassing parts of modern Tohoku.
In this sentence, 奥州 (Ōshū) is used as a proper noun referring to the historical region in Japan.
奥州は日本の歴史的な地域です。
Ōshū is a historical region in Japan.
Here, 奥州地方 refers to the broader area associated with the Ōshū region, emphasizing its geographical and cultural aspects.
彼は奥州地方の文化に興味があります。
He is interested in the culture of the Ōshū area.
In this example, 奥州 is used to specify a destination, highlighting it as a place to visit.