There are ninjas that you will never see. They are called "innin" or "shadow ninja." And then there are the ninjas that you see every day. The "younin" or "undercover ninja" operate under your nose, without your even realizing their true nature. In foreign countries, the boldest among them even proudly display the fact that they are ninja, knowing that the vast majority of the local populace can't read the Japanese characters for "daylight" and "stealth." The ones who can, however, don't for long...
