1st Year Required - Introduction to Spiritual Pressure

The difference between spiritual energy and spiritual pressure 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. In other words, Reiryoku is potential while Reiatsu is energy in use and can be sensed by other spiritually aware beings. 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 Reiryoku by possessing greater Reiatsu - this is achieved by having greater control over their own spiritual energy.



The senses by which one feels and pick up on Reiatsu are known as "Reikaku" or "Reiatsu Chikaku". Every person that has Reiatsu subconsciously uses both their sense of vision and their Reikaku at the same time in order to see. When concentrating in the midst of battle, Reikaku takes over an overwhelming amount of perception; in other words, the subconscious begins to stop seeing with "eyes".



All Shinigami have vents located at their wrists that vent out their Reiatsu. If they are blocked off, then the Shinigami in question will be incinerated by their own Reiatsu from within.