He believed that the predicted lunar eclipse which was forecasted to occur on December 18, 1117 would not occur, and his idea turned out to be true ("Denryaku" (Diary of FUJIWARA no Tadazane)).
同5年11月16日(旧暦)（1117年）と予報された月食の発生を否定する意見を述べたところ、的中させた（『殿暦』）。