Kouton: Toukou : Rain Release: Winter Rain A technique that requires rain to be present. This Jutsu causes the temperature of the rain to drop dramatically, to the point of freezing. The enemy’s body temperature could lower gradually if they are exposed to the rain, causing extreme discomfort along with disorders pertaining to cold exposure: hypothermia, trench foot, frost nip, et cetera. Frostbite is highly uncommon, but very possible.