Fūrinkazan

Fūrinkazan (風林火山?), literally "Wind, Forest, Fire, Mountain", is a popularized version of the battle standard used by the Sengoku period daimyo Takeda Shingen. The banner quoted four phrases from Sun Tzu's The Art of War: "as swift as wind, as silent as forest, as fierce as fire, as unshakeable as mountain."

The Fūrinkazan battle standard is represented in the Teenage Mutant Ninja Turtles: The Ultimate Visual History book, next to the concept art of the turtles in new suits for battle for the 2012 TV series.

The four phrases are writen below the turtles: Raphael - ...In raiding and plundering be like fire, Leonardo - ...Let your rapidity be that of the wind, Donatello - ...Be immovable, like a mountain, Michelangelo - ...Your compactness, that of the forest