But already in June, their insurgence plan was exposed to the Taira clan, who then ordered Kebiishi-cho (Imperial police force) to arrest Prince Mochihito, but the fact that the dispatched force included Kanetsuna, adopted son of Yorimasa, indicates that the Taira clan did not notice Yorimasa's involvement in the insurgence yet.
だが5月にはこの挙兵計画は露見、平氏は検非違使に命じて以仁王の逮捕を決める、だが、その追っ手には頼政の養子の兼綱が含まれていたことから、まだ平氏は頼政の関与に気付いていなかったことがわかる。