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Iehisa rose through the [[court ranks]] over the course of his career; in [[1599]] he held the title of [[ritsuryo|Minor Captain]] (少将, ''shôshô'') and the Lower Senior Fourth Rank. He was named Royal Advisor and concurrently Middle Captain (参議兼中将) in [[1617]], and was then raised to the title of ''Chûnagon'' and to the Junior Third Rank in [[1626]].<ref>Kamiya Nobuyuki, ''Ryûkyû to Nihon, Chûgoku'' 琉球と日本・中国, Yamakawa Shuppansha (2008), 62.</ref> This was the highest [[court rank]] any Shimazu lord would achieve in the Edo period.<ref>Miyagi Eishô 宮城栄昌, ''Ryûkyû shisha no Edo nobori'' 琉球使者の江戸上り, Tokyo: Daiichi Shobô (1982), 101.</ref>

Iehisa rose through the [[court ranks]] over the course of his career; in [[1599]] he held the title of [[ritsuryo|Minor Captain]] (少将, ''shôshô'') and the Lower Senior Fourth Rank. He was named Royal Advisor and concurrently Middle Captain (参議兼中将) in [[1617]], and was then raised to the title of ''Chûnagon'' and to the Junior Third Rank in [[1626]].<ref>Kamiya Nobuyuki, ''Ryûkyû to Nihon, Chûgoku'' 琉球と日本・中国, Yamakawa Shuppansha (2008), 62.</ref> This was the highest [[court rank]] any Shimazu lord would achieve in the Edo period.<ref>Miyagi Eishô 宮城栄昌, ''Ryûkyû shisha no Edo nobori'' 琉球使者の江戸上り, Tokyo: Daiichi Shobô (1982), 101.</ref>

Iehisa was also confirmed in his fief, with a ''[[kokudaka]]'' of 605,607 ''[[koku]]'' in 1617. As such, Ueno Takafumi cites this as marking the Shimazu clan's first performance of ''[[sankin kotai|sankin kôtai]]''.<ref name=ueno4/>

Iehisa was also confirmed in his fief, with a ''[[kokudaka]]'' of 605,607 ''[[koku]]'' in 1617. As such, Ueno Takafumi cites this as marking the Shimazu clan's first performance of ''[[sankin kotai|sankin kôtai]]''.<ref name=ueno4/> In [[1624]]-[[1625]], Iehisa journeyed again to Edo, this time leaving his wife [[Shimazu Kameju]] in Edo as a political hostage; this is said to have been done on Iehisa's initiative, and marks an early example, or precedent, upon which the shogunate based its later decision to oblige all ''daimyô'' to leave their wives and heirs in Edo as hostages.<ref name=ueno4/>

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