今昔物語集
On the other hand, the "Konjaku Monogatarishū" (ca. 1120) gives another reason for the conflict, namely that Masakado's uncles had appropriated the lands the young man was supposed to inherit from his late father. Masakado's uncle (平国香), who as Takamochi's eldest son was the head of the clan, might have tried to take over his younger brother Yoshimochi's property and place it under his control. Kunika, like Yoshikane, was related by marriage ties to Mamoru, who would eventually become involved in the conflict.