Numbing Poison is a substance applied to bamboo breathing tubes to incapacitate those who inhale through them. Kakita Kazumi used this poison to create a trap for potential assailants, ensuring the tubes appeared undisturbed after application. The poison's effects are unpleasant and serve as a strategic measure against intruders. The tubes were discovered carefully buried among reeds along the shoreline, indicating a method of infiltration involving waterborne approaches.