Koichi Tohei San Francisco Demonstration, 1974 Koichi Tohei - ki aikido 5/5 Fundamental Concept Principle. Koichi Tohei - ki aikido 4/5 Fundamental Concept Principle. Koichi Tohei - ki aikido 3/5 Fundamental Concept Principle. Koichi Tohei - ki aikido 2/5 Fundamental Concept Principle. Koichi Tohei - ki aikido 1/5 Fundamental Concept Principle. Tohei Koichi.