Imperial Prince Atsuyasu was close friends with FUJIWARA no Yorimichi, who was Michinaga's eldest son and served as regent, and their wives were sisters; therefore, they shared the same residence (some say that Imperial Prince Atsuyasu's wife, the Imperial princess, was brought up by Yorimichi and his wife for a time before her marriage).
親王は道長の嫡男摂政藤原頼通と親しく、合婿となり家を共にしていた（親王妃は婚姻前には一時頼通夫妻が養育していたともいう）。