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Atai (post-Taika reform hereditary title often given to regional administrators)
古代の日本で費という称号があった。
In ancient Japan, there was a title called Atai.
費の位は地方の豪族に与えられた。
The Atai rank was given to local powerful clans.
歴史の本で費の制度について学んだ。
I learned about the Atai system in a history book.