Reiryoku

Reiryoku (霊力; English: Spiritual Power) is a set of abilities that draw power from the user's own spiritual energy. According to Lady Kanade, while all humans posses spiritual power exclusively, it seems only certain gifted individuals are capable of exercising this energy for specific purposes. Normally these individuals pursue the occupational roles of monks, priests and priestesses, and exorcists.

Many, if not most, Yōkai, are especially vulnerable against this power due to its nature of purifying their demonic energy. However, some demons such as Miko fūji and Oni's head are capable of absorbing spiritual power from monks and priestesses alike to fuel their own power. Daiyokai, such as Kaguya, are even capable of utilizing the power for themselves, should they absorb it.

Known Uses

 * Spells: There are several mystic spells and curses that are derived from spiritual energy. These spells can be either offensive or defensive, and their potency is dependent on the spell-caster's own level of spiritual power. These spells, depending on their requirements, can be triggered by ritual actions and/or incantations.
 * Barriers: Users can focus spiritual energy into a solid energy barrier. The strength of the barrier is dependent on the one who erected it; the greater their spiritual power, the more resilient their barrier is. While barriers are protective in nature, they can be used for offensive purposes as well.
 * Purification: According to Lady Kanade, a human's spiritual power normally clashes with the demonic power of a demon. If the human's spiritual power is strong enough, this can dispel the demonic energy of a demon or demonic force, and thereby destroy it.
 * Spiritual Sensitivity: Those with above average spiritual power can usually sense spiritual power or demonic auras. Some spiritualists can even perceive things that are otherwise invisible to ordinary people (e.g. ghosts, spirits, and divine auras).

Known Users

 * Midoriko †
 * Kikyō †
 * Kikyō's clone †
 * Kagome Higurashi
 * Tsubaki † (alive in manga)
 * Momiji
 * Botan
 * Hitomiko †
 * Kaede
 * Tsukiyomi †
 * Kanade †
 * Miyatsu †
 * Miroku
 * Seikai †
 * Musō
 * Hakushin †
 * Shinsen
 * Ungai

Trivia
Reiryoku 靈力
 * There are several implications that great spiritual power is not just an ability tied to one's spirit, but also a genetic predisposition. For example:
 * Kikyō and her sister Kaede had above average spiritual power.
 * Kikyō's genetic clone had some level of spiritual power.
 * Miroku's family was known to have monks with great spiritual power.
 * According to Lady Kanade in InuYasha the Movie: Fire on the Mystic Island, the spiritual power a human possesses normally clashes with the demonic power of a demon, in half-demons this power merged and produces a unique synergy of these powers.