Ienaga distinguished himself in the Battle of Ichinotani and was given Jitoshiki (manager and lord of manor) of Kusakabe no sho (manor), Bicchu Province as Onsho (reward grants).
家長が一ノ谷の戦いにおいて、武功を上げ、恩賞として備中国草壁荘地頭職を与えられた。