Ninja insurance is a form of insurance that has existed since the establishment of the National Ninja Association (approximately 7,999,999,999,999 B.C). Ninja insurance is insurance against injury for ninja. It is obvious that it is impossible for ninja to become injured during battle; due to all those who ninja battle being complete n00bs - and for this purpose ninja insurance does not cover injuries sustained during battle. Ninja insurance costs approximately ¥2340 per year, which is about US $25.00.