Kunai Rain is a Stacked Secret Ninja Art in Senran Kagura 2: Deep Crimson. It requires both characters have at least 3 bars of Ninja Art Energy to use. Like all Stacked Secret Ninja Arts, its power increases with the characters' mutual affection.
Both characters leap into the air and launch a barrage of kunai, both finishing off by each throwing an explosive.
- Both the color of the explosives and the aura around the kunai match the color of the aura used for the characters preforming the attack.