Shinobi - In-Box - NESCLASH OF THE MASTER NINJAS. Shinobi. It's Japanese for stealth, the perfect description of a Master Ninja. And that's exactly what you are! Armed with throwing stars and finely honed battle skills, you must defeat The Ring of Five. Fight your way past mercenaries and karate thugs. Take out the meanest martial artists and rescue hostages. But these dangers pale in comparison to your ultimate challenge: A fight to the death against five evil Ninja