Why pick a Ninja as a logo?
Many who see the word ninja associate it with a killer or assassin. So many business gurus may consider using ninja as not great for most businesses. I have had a few say this. The black suits, the weapons, & the martial arts. The image of the ninja is rooted more in fiction than fact. Fact is what you know about ninjas is probably wrong or more wrong than right.
Ninja did exist, but they were more about info and disinformation than just assassination. Yeah there were ninja assassins. When you consider human behavior you can assume a chance that some would choose the assassin route. Overall ninja were more like CIA or FBI. Sure they are trained to fight and kill but what percentage of them are actually trained assassins?