The way of Watazumi is to take your life force, your life strength and train it to be stronger, healthier. As you are all into playing music, there is something deeper and if you go deeper to the source of where that music is made, you will find something even more interesting. At that source, everyone's individual music is made. That place is your own life force. You have to use conscious, mindful breath.
Most people use unconscious breath, simple movement of the lungs.
This type of breathing is like a pool of water that has been stopped up and is stagnating. It is important to regularly review your breathing or lapsing into breathing shallow will create tension in the body. The instructor should give this cause special attention when looking at why a singer may be having trouble with certain notes. Gently inhale, pause then slowly exhale, picturing the gentle stream of air. Empty the lungs fully.