Dream about being a ninja is a signal for your culture and tradition. You need to cool off or that you need to keep your cool. There are some issues about which you are angry about in your life. This is a symbol for dissatisfaction with some aspect of your home life. You need to look toward the future instead of reliving the past.
Being a ninja dream points at concerns with your body and appearance. Something is eating away at your subconscious. You are trying to hide under a facade. This dream points at reconnection and reopened communication. You are trying to achieve success without doing the work.
If you dreamt about being a ninja:
You are in a good position today to take advantage of a situation that is floundering. People need direction and you can give it to them. Your natural take-charge personality is exactly what is needed - so don't be afraid to stand up and take the lead.