The Satori (覚, Satori lit. Consciousness) are a type of mountain-dwelling yōkai in Japanese folklore that holds the power to read human thoughts. The creature is said to approach travelers on mountain paths in hominid form and speak their thoughts aloud.
It said that only way to counter a satori is to empty one's mind, in which case the creature will grow bored and leave, run in fear, or even die.
- Wikipedia entry for Satori