Reiryoku is the energy stored within items around in the environment/Within the person himself.
Reiatsu is the spirtual energy/PRessure that the person exerts due to their Reiryoku.
Quote:
The difference between spiritual pressure and spiritual energy is simple: Reiryoku is the amount of energy a being has stored within their body or soul, whereas Reiatsu is the pressure that a person’s Reiryoku exerts. The difference is much like energy and power. Power being the amount of energy exerted per unit of time. Reiryoku is potential while Reiatsu is energy in use. In general, those with high levels of Reiryoku will often have the highest levels of Reiatsu also. A skilled warrior can overcome a person possessing greater Spirit Energy by possessing greater Spiritual Pressure.
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