The symbol next to the beast symbol on its status screen, that symbol represents Kin right? It has a 100 number on it just like the beast symbol.
All the weapons have 100 points on both beast and kin icons and there's no indication for the serration/righteous bonuses in the weapon stats. For example Kirkhammer also has 100 beast/100 kin same as the Saw Cleaver even though SC does bonus dmg against beasts on it's first form while KH does righteous dmg on it's sword form.