In the anime series of Tokyo Ghoul:re 2 , episode 12, Kichimura says he provoked the appearence of Dragon. In some former episode, when Kaneki mutated into Dragon , he was expecting it, as if he knew it was going to happen, he called it "dragon", and he said something like he expected dragon to destroy everything.
Why did Kichimura know Kaneki was going to mutate into Dragon, and why did he say he provoked it?