Shinzei himself confiscated the lands owned by FUJIWARA no Yorinaga, who perished in the Hogen Rebellion, and nominally added these estates to the land already prescribed for the Emperor's use after he abdicated the throne, yet in reality devoted his undivided attention to making those lands into a buffer to guarantee his own financial footing.
信西自身は、保元の乱で敗死した藤原頼長の所領を没収して後院領に組み込み、自らはその預所になるなど経済基盤の確保にも余念がなかった。