I don't see why people are downgrading Ryokugyu based on taking a club from Yamato to the head. The scabbards were piercing Kaido's skin, Yamato was smashing Kaido into the head too, even made his head bleed, even through durability is Kaido's main forte. Ryokugyu being occupied by the Scabbards and Yamato sneaking in with a Bagua at high speed, nothing crazy yet.
Kinemon made Kaido bleed lmfao.
With cutting attacks infused with Ryuo, which effectively bypass Kaido's scales. Yamato did that with blunt force, which is remarkable. Something boundman could not achieve. Even with advanced Haki, he didn't actually make the scales drop blood.