Takakura, who abdicated the throne and became the retired emperor in March 1180, firstly started Shasan (visit to shrines or temples) in Itsukushima-jinja Shrine in Aki Province, which broke the traditional custom, from April to early May in that year.
治承4年（1180年）2月に譲位して上皇となった高倉の最初の社参が、その年の3月から4月上旬にかけて、従来の慣例を破って安芸の厳島神社でおこなわれた。