The Voice That Returns from the Mountain

Japanese Name	山彦
Romanization	Yamabiko
Classification	Mountain Echo Spirit
Expedition	Expedition I — Sacred Forests
Threat Level	■□□□□ (Level I – Minimal)
First Recorded	1776 CE — Gazu Hyakki Yagyō

Yamabiko is the supernatural presence traditionally associated with echoes returning from mountains and deep valleys. Rather than being defined by one fixed body, it is most strongly identified by sound: a human voice, shout, or sudden noise repeated back from somewhere unseen. Toriyama Sekien gave Yamabiko a recognizable illustrated form in 1776, but later regional traditions continued to describe it primarily as a mysterious answering voice within the mountains.