Ki Breathing By Koichi Tohei Sensei -

The practice is designed as "whole body breathing" where the mind leads the body.

Maintain purpose and control throughout the breath. Ki Breathing by Koichi Tohei Sensei

Tohei Sensei claimed that regular practice, especially 15 minutes before sleep, could lead to increased vigor and health. Ki Principles by Tohei Koichi Sensei - Boulder Ki Aikido The practice is designed as "whole body breathing"

(Ki-no-kokyuho) is a foundational practice developed by Koichi Tohei Sensei , the founder of the Ki Society and Shin Shin Toitsu Aikido. Unlike labored deep breathing, Tohei Sensei’s method emphasizes naturalness and the unification of mind and body to activate one's "life power" and maintain harmony with the universe . Core Philosophy Ki Principles by Tohei Koichi Sensei - Boulder

Tohei Sensei taught that our lives are part of the "universal Ki" and that breathing is the primary method to keep this conflux unimpaired.

The breath should make a distinct but barely audible sound (often described as an "a" sound rather than "h" to better engage the diaphragm).

Correct breathing is impossible without a natural, stable, and relaxed posture, which Tohei called "the posture of mastery".