Wakasanosuke comes to the castle saying, "koikuchi (carp's mouth, the open end of the scabbard) of my sword, hold your breath, I will split Moronao in two," and he tries to slash Moronao.
「おのれ師直真っ二つと、刀の鯉口息をつめ」と、登城した若狭助は師直を斬ろうとする。