False. Because in order to break a diamond, you need to take into consideration other properties such as toughness which is the key to breaking a diamond. Kakuzu only takes on the property of hardness, not toughness.You do realize that diamonds can be cut using gem cutters? Diamonds aren't invincible. In fact if Kazikage who used iron sand made a thinly shaped sword with a small minuscule needle like point at the top and a razor thin edge then it could definitely cut open the diamond on kakuzu.
Also, Domu isn't diamond as diamond isn't immortal or a defense raised to maxium output. Domu is a substance harder than diamond. Much harder.
LMLContradicting yourself now
You must be registered for see images![]()
Chidori's english name is 1000 birds so Chidori must be 1k birds. Diamond part is just a metaphor for hard substance, nothing else. Domu > Diamond.