Chris Wright contacted Sensei asking about the Triangle, Circle and Square philosophy.

Answer..

These three signs are symbolic of the breathing exercise of Koto Dama (literally, "word-spirit", a Shinto practice based on the concept that certain sounds are imbued with, or help connect us with, the Universal Energy).

In the words of the Founder: When the Triangle, the Circle, and the Square become one, it moves in spherical rotation together with the flow of Ki, and the Aikido of Sumi-Kiri appears.

We also relate each of these symbols to the basic principles behind all of the techniques in Aikido:

The Triangle, representing conflict, and the initial principle of getting off the line of attack.

The Circle, representing harmony; the circular, wave-like movements, which serve to blend our energy with that of our opponent.

The Square, representing resolution, good humour, and inner stability; the pin or throw which brings about a peaceful reconciliation with our partner.

The Japanese character embedded within the Triangle, Circle, and Square is the symbol for Ki (energy, life-force).

Below is a diagram of the Triangle, Circle and Square,

I hope this answers your question Chris. If not or if you have anymore questions relating to this topic or any other please email me at ashley@shinkoaikido.com