Soul/Chishiki

The Chishiki (知識; lit. "Knowledge") is an aspect of the soul based around information. Given the narrative revolving this proposed component, scholars - people who sole purpose is to gain knowledge - have eagerly pursued and made theories based on this ingredient. However, not much information, such as the extent or maximum capacity - if any - does the Chishiki possesses.

Overview
Chishiki (知識; lit. "Knowledge"), is a component of the soul that governs one's knowledge. The Chishiki isn't to be confused with a person's intellect or their capacity to learn, as it simply is a category that revolves around an individual's gathering of knowledge. It plays off a person's sensory, as they can only gain knowledge of things they perceive. The Chishiki covers technical knowledge - such as the ability to read, write, do mathematics - and governs an organism's overall ability to remember things, as well as even think. The Chishiki is known to falter overtime, hence an elderly person sometimes having a hard time recalling information.

Externally, this aspect of the soul - like many others - can be accessed by outsiders. As such, it is potentially possible to read someone's mind. However, this component is also written in stone in a sense. While a person may not be able to access this portion of their spirit, the memories are still tangibly there - they're simply unable to be reached. This part of the soul also makes it possible for false memories to be put in place, either by techniques, or as a defense mechanism to protect the person from traumas.

Regardless, while the false memories may be in place, it is possible to see through them. Once dispersed, the true memories spring to the forefront. It's to be noted that the Chishiki only allows one to access memory experienced within their natural lifespan.