The three fundamental principles of kata empasized by Mas Oyama
技の緩急 Waza no Kankyū
The Relative Tempo of Techniques:
The tempo of the kata varies – some techniques are performed quickly, while others are done more slowly.
力の強弱 Chikara no Kyōjaku
The Relative Force of Power:
The power of a technique derives from the proper balance between strength and relaxation.
息の調整 Iki no Chōsei
The Control of Breathing:
The correct timing (inhaling and exhaling) and force of the breaths (Kiai 気合, Ibuki 息吹 or Nogare 逃れ) are essential for proper techniques.