Although Mototsuna attempted to defend the Shokoku-ji Temple with 3,000 soldiers against the attack, part of Buddhist priests who communicated secretly with the Western Camp set fire to the inside of the Temple, and consequently, the Eastern Camp became upset and collapsed completely.
元綱は三千騎を率いて相国寺を守ったが、一部の僧侶が西軍に内応して相国寺内部から火を放ったことから東軍側は動揺し総崩れとなった。