Fūrinkazan

Fūrinkazan (Japanese: 風林火山, "Wind, Forest, Fire, Mountain") is a popularized version of the battle standard used by the Sengoku period daimyō Takeda Shingen.

The banner quoted four phrases from Sun Tzu's The Art of War: "as swift as wind, as gentle as forest, as fierce as fire, as unshakable as mountain."

The original version of the banner is mentioned in the Kōyō Gunkan, a record of the military exploits of the Takeda clan.

[1] The character Ryu from the video game series Street Fighter has the Furinkazan on his belt as well as highly stylised versions of the Japanese symbols on his gloves.

[4] The character Sanada Genichirō, a tennis player with a kendo background from the manga series Prince of Tennis employs a set of techniques in his style of tennis named after the Furinkazan; "Fū" is an extremely fast swing that is based on a sword-drawing technique that makes the ball invisible to the eye, "Rin" is a slice that neutralizes the spin on the ball, "Ka" is an extremely powerful shot to overwhelm the opponent and "Zan" is Sanada's "Iron Wall of Defence" in a figurative sense, allowing him to return any ball the opponent may hit towards him.