In 1340, he got angry when his retainer was beaten by a sohei (armed priest) of the gosho (Imperial Palace) of Myohoin, who was a younger brother of the Emperor Kogon, and set fire to the palace together with his father and burnt Kennin-ji Temple by spread of fire.
興国元年/暦応3年（1340年）、家臣が光厳天皇の弟である妙法院の御所の僧兵に殴打された事を怒り、父と共に御所に火をかけ建仁寺を延焼させる。