On September 26, 999, when Chugu (the Empress) of Emperor Ichijo, FUJIWARA no Teishi/ Sadako withdrew from the Imperial Palace, as she was pregnant with Imperial Prince Atsuyasu, she chose Narimasa's residence to give birth.
長保元年（999年）8月9日(旧暦)、一条天皇中宮であった藤原定子が敦康親王を懐妊し内裏を退出する際、生昌の邸を行啓先とした