Sure.
He saw saw a rock giant standing in front of the mountain shack at a height of around of five meters.
This is just so you have an idea of the golem's size. Now for the actual feat.
Saying that, Ikki raised his left hand closer to his blade, and drew the right hand that held Intetsu back with all his strength. It was plainly a stance for thrusting.
But the stone giant didn't care―no, as if it didn't have any will of its own, it lunged with its stone fist mechanically. A monotone attack with such sluggishness couldn't possibly get through the Worst One.
Ikki turned toward the rock giant, and with superhuman strength granted by Ittou Shura, he rushed forward as if flying. He just barely crossed right beside the stone fist as it passed.
―With the right hand that he was drawing back with all his strength, he unleashed a forward stab. A flash of steel that broke the sound barrier took flight.
It wasn't an ordinary thrust. Arm strength, leg strength, charging power―more than Ikki's superhuman body mastery, the vector of all of his power was focused on the point of his sword, a technique that forced out his highest offensive ability. This was the secret technique that boasted the strongest offensive ability among the Worst One's seven secret swords.
"The first secret sword―Saigeki!"
Ikki, who charged as if flying, without decelerating, made his body into a bullet and pierced the rock giant's chest. The impact of the penetration struck the giant's body, and from the huge hole bored into its chest, the giant made from joining rocks collapsed while making a clattering noise. The rocks being joined together fell apart, and returned to rubble having lost the humanoid shape.
I would wait until chapter 25 comes out, just so we know how big the hole was.
