高師直(こうのもろのう)から執拗な(しつような)嫌がらせ(いやがらせ)と侮辱(ぶじょく)を受け(うけ)続け(つづけ)、我慢(がまん)の限界(げんかい)を超えた(こえた)ため

'The Treasury of Loyal Retainers' (Kanadehon Chushingura) is the greatest hit in the history of Japanese theater, portraying the revenge of the Ako Ronin (a real-life vendetta) disguised as an event of the Muromachi period. The lord Enya Hangan suffered continuous, persistent harassment and insults from the arrogant Ko no Moronao. Finally, exceeding the limit of his patience, Hangan slashed at Moronao inside the castle.