At its climax, Muneyoshi uncorked a ferocious whack that would have sent his weapon right through the tengu--had not the crafty goblin executed a nimble dodge. The swordsman struck instead the boulder that has been called ever afterward, the itto seki, the "single stroke sword rock," cleaved by a force so enormous that the explosion it made that night, if you stand alone in the clearing where the rock is, seems still to echo along the valleys and gorges all around.