When the Hosokawa family was transferred from the fief of Buzen and Bungo provinces to that of Kumamoto Domain, Higo Province in 1632, Okinaga was given a territory of Thirty thousands Goku crop yields in Tamana and Koshi counties.
寛永9年（1632年）、細川家が豊前・豊後から肥後国熊本藩に国替になると、興長には玉名郡・合志郡の内に3万石が与えられた。