yukinari replied that it would be impossible to receive approval from michinaga , who held the powerful office of administrator , and that if imperial prince atsuyasu was succesfully installed as crown prince , it might even result in political turmoil leading to a coup; furthermore , he stated that members of the takashina clan , which was the maternal clan of the late empress , imperial prince atsuyasu ' s mother , were afraid to visit ise-jingu grand shrine located in ise , and did their utmost to dissuade emperor ichijo from installating imperial prince atsuyasu as crown prince . 行成は執政者道長の賛成が得難く政変の可能性まであるとした上で、親王の母后の外戚家高階氏が伊勢の伊勢神宮に憚る所ありと言い、極力諌止した。