Hyakki Yakō (百鬼夜行; lit. "Night Parade of One Hundred Demons")
* Sakazuki (杯事?) is the term used for a pledge of loyalty made over an exchange of wine or sake. This pledge is taken very seriously, and is akin to a blood pledge, linking fellow yōkai of different families. A 50-50 portion division gives equal footing to both parties, and is considered a sakazuki of sworn brothers. A 70-30 portion division is a pledge of fealty between a boss and his subordinates, and requires a great amount of trust on the part of both parties.[3]
* Osore (畏, lit. "Fear"?) is the term that denotes the unique skills and traits of each yōkai. It refers to the "Fear" of the unknown, an emotional reaction produced when the yōkai represent themselves as "monsters". It is especially important for leaders who wish to draw together gangs of yōkai. There are different types of "Fear" depending on the species of yōkai, such as water or ice. It also plays an important role in battles between yōkai, in which they must "scare one another".
* Hatsu (鬼發, lit. "Manifestation"?) is the first stage of activating "Fear", and is simply an attempt to scare an opponent by exerting a frightening aura. Those affected by "Manifestation" will experience an overwhelming sense of intimidation, and depending on their opponent's skills, may hallucinate. This aura produces a palpable wall of pressure in the atmosphere, and cutting through this tension to reach the enemy is an important part of yōkai combat.
* Hyōi (鬼憑, lit. "Haunting"?) is the second stage of activating "Fear" used in yōkai battles. It is the process by which a yōkai materializes their "Fear" into an attack that can harm their enemy by severing their "Manifestation". Yōkai can produce a variety of attacks and techniques based on their type of "Fear".
* Matoi is a special technique allowing the leader of the Hyakki Yakō to strengthen their "fear". This technique was created by the Second Head of the Nura Clan, Rihan Nura, and will only work for a leader who is part human. The explanation for this requirement is that the leader must have a 'human heart' to be able to empathize or 'understand' his subordinates, in order to invoke Matoi. The technique works by 'layering' or 'covering' the leader in his subordinate's fear, which augments and strengthens his own power. The leader literally 'wears' his subordinate, which also gives him access to his subordinate's unique abilities (when Rikuo used Matoi with Tsurara, his attacks gained the ability to freeze his targets). When Matoi is invoked with a subordinate for the first time, a tattoo-like marking appears on the leaders body, symbolizing the pact they have made.
* Sakazuki (杯事?) is the term used for a pledge of loyalty made over an exchange of wine or sake. This pledge is taken very seriously, and is akin to a blood pledge, linking fellow yōkai of different families. A 50-50 portion division gives equal footing to both parties, and is considered a sakazuki of sworn brothers. A 70-30 portion division is a pledge of fealty between a boss and his subordinates, and requires a great amount of trust on the part of both parties.[3]
* Osore (畏, lit. "Fear"?) is the term that denotes the unique skills and traits of each yōkai. It refers to the "Fear" of the unknown, an emotional reaction produced when the yōkai represent themselves as "monsters". It is especially important for leaders who wish to draw together gangs of yōkai. There are different types of "Fear" depending on the species of yōkai, such as water or ice. It also plays an important role in battles between yōkai, in which they must "scare one another".
* Hatsu (鬼發, lit. "Manifestation"?) is the first stage of activating "Fear", and is simply an attempt to scare an opponent by exerting a frightening aura. Those affected by "Manifestation" will experience an overwhelming sense of intimidation, and depending on their opponent's skills, may hallucinate. This aura produces a palpable wall of pressure in the atmosphere, and cutting through this tension to reach the enemy is an important part of yōkai combat.
* Hyōi (鬼憑, lit. "Haunting"?) is the second stage of activating "Fear" used in yōkai battles. It is the process by which a yōkai materializes their "Fear" into an attack that can harm their enemy by severing their "Manifestation". Yōkai can produce a variety of attacks and techniques based on their type of "Fear".
* Matoi is a special technique allowing the leader of the Hyakki Yakō to strengthen their "fear". This technique was created by the Second Head of the Nura Clan, Rihan Nura, and will only work for a leader who is part human. The explanation for this requirement is that the leader must have a 'human heart' to be able to empathize or 'understand' his subordinates, in order to invoke Matoi. The technique works by 'layering' or 'covering' the leader in his subordinate's fear, which augments and strengthens his own power. The leader literally 'wears' his subordinate, which also gives him access to his subordinate's unique abilities (when Rikuo used Matoi with Tsurara, his attacks gained the ability to freeze his targets). When Matoi is invoked with a subordinate for the first time, a tattoo-like marking appears on the leaders body, symbolizing the pact they have made.
