Kanpaku (chief adviser to the Emperor) Kanezaen KUJO, who had been on favorable terms with the Kamakura clans, was ousted from power, putting Yoritomo's position at the Imperial Court government into danger and making the chance of Sanman marrying into Imperial family virtually impossible.
親鎌倉派の関白九条兼実が失脚し、朝廷政治での頼朝の形勢が悪化し三幡の入内も困難な情勢になった。