Soul Summoning

Soul Summoning (び, Tamayobi) is a technique which is known to be the only way for an individual to escape Yomi. It works by having one's name act as a tether between the Near Shore and the Far Shore. When a human speaks the target's true name, they are able to summon them to the living realm from Yomi.

Restrictions

 * Only living humans can use this ability. It fails if performed by a god, spirit, or shinki.
 * The human must have already established ties with the individual they want to summon.
 * It only works with one's "real name," rather than nicknames or aliases.
 * It usually does not work on humans, although a loophole for this exists.
 * This ability is not common knowledge amongst gods. Neither Yato nor Bishamonten were aware of its existence, and Kofuku only learned of it after being informed by Amaterasu. However, the Stray did know of it, after most likely being informed by Father.

Usages

 * An unknown person used it on Father. Although humans are not supposed to be able to return from Yomi after death, Father was able to be called back through a loophole, giving him "godlike abilities" upon return. The exact details of the loophole are currently unknown.
 * Hiyori Iki uses it on Bishamonten and Yato.

Adaptation Notes

 * Since Amaterasu does not make an appearance in the anime, it is instead Ebisu who informs the others of this ability.

Cultural References
In old Japanese tradition, tamayobi (び) or tamayobai (ばい) refers to attempts to call a deceased person's soul back to the living realm. This was done by either climbing to a roof or looking down a well and shouting the deceased person's name. Interestingly, a modern Japanese word for "revive"/"come back to life" is る yomigaeru, lit: "to return from Yomi (the Underworld)".