He was the grandson of [[Arai Kageyu]] (d. [[1609]]); his father was ''[[metsuke]]'' [[Arai Masanari]] ([[1601]]-[[1682]]), and his mother, a daughter of the [[Fujiwara clan]] by the surname Sakai ([[1617]]-[[1678]]).
He was the grandson of [[Arai Kageyu]] (d. [[1609]]); his father was ''[[metsuke]]'' [[Arai Masanari]] ([[1601]]-[[1682]]), and his mother, a daughter of the [[Fujiwara clan]] by the surname Sakai ([[1617]]-[[1678]]).
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Hakuseki entered the service of the [[Hotta clan]] in [[1682]], at the age of 26, and later married a daughter of [[Asakura Nagaharu]], another Hotta retainer. His first daughter, Shizu, was born in [[1687]], but died in infancy, possibly at birth. His second daughter, Kiyo, was born in [[1689]]. Hakuseki's first son, [[Arai Akinori]], was born in [[1691]]; Hakuseki resigned from his service to the Hotta earlier that year.<ref>Ackroyd, 283n82.</ref>
He was granted court rank in [[1709]].
He was granted court rank in [[1709]].
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==References==
==References==
*Arai Hakuseki, Joyce Ackroyd (trans.), ''Told Round a Brushwood Fire'', University of Tokyo Press (1979), 279-308.
*Arai Hakuseki, Joyce Ackroyd (trans.), ''Told Round a Brushwood Fire'', University of Tokyo Press (1979), 279-308.