The cause was that monks at Hakusan appealed to the Sanmon because Morotaka, Saiko's child, became governor of Kaga Province and the Mokudai (substitute for the governor who lives in the province and performs actual duties) Morotsune burned down Ukawa-ji Temple, a branch temple of Hakusan,
発端は西光の子・師高が加賀守となり、目代・師経が白山の末寺・宇河寺を焼いたことに激怒した白山の僧侶が山門に訴えたことだった。