Ratio Technique (十劃呪法, Tookaku Juhō?) is Kento Nanami's innate technique. It grants him the ability to divide his target with lines and forcibly create a weak spot at the ratio point of seven to three. Jujutsu Kaisen: Nanami's Ratio Technique, Explained When used by Nanami, the Ratio Technique allows him to divide a target into tenths. On striking said target at exactly the point where the ratio is 7:3, they will be able to deliver a critical hit. He is very chill and intelligent, a clever man.