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#Baekgwi Jeonseunggi (百鬼傳承記) - Yoma Compendium

Contents

Chronicle of a Hundred Yokai cover

Data Catalog + Campaign Module + Reference Only. This volume does not replace the co Yoma Bestiary. It interprets existing yoma more deeply and supports era-based variants, enhancement backgrounds, companion-making, and yoma PC operation.

Core boundary: A yoma PC is not a substitute for the hanyo. A hanyo is a human between two bloods, while a yoma PC is an apparition that has entered human society.

Series specification: ../co/co-99-meta/co-99-03-fc-spec.md

#Opening Vignette - The Road the Hundred Demons Passed

On the third night after the battle ended, no lantern had yet been lit on the road beneath the ruined castle.

The monk trod the mud barefoot. The paddies by the road were dry, and broken spear shafts were stuck into the ridges. He tied a small piece of paper to each of those shafts. For those whose names he knew, the name; for those whose names he did not know, he wrote "So-and-so."

As midnight drew near, the sound of drums came from the direction of the mountain. At first it was far. Next it was near. At last it sounded underfoot.

A black procession crossed the road. A burly man with horns growing from his head, a woman whose neck had stretched long, a fox wearing a smiling mask, blue fire blazing within a broken suit of armor, a child wearing a water-soaked sedge hat. They did not resemble one another, yet they walked the same road. No one spoke.

The monk gripped his prayer beads and asked.

"Where are you going?"

At the tail of the procession, a small demon bearing an old drum turned to look back.

"To the place where people gave us our names."

When those words ended, a wind blew. The names written on the papers swayed all at once. Only then did the monk understand. It was not only the names of the dead that remained on the road. A name was given to each thing that people feared, and to each thing that received a name, a road by night was given.

From that night on, that road was called the road of the hundred demons.

#Scent - The Book of the Hundred Demons

This book does not treat yoma as a mere list. Yoma come alive within names, places, rumors, the Gate of the Spirit Realm, and the responses of human factions. Even the same oni, if on a battlefield, feeds on the spirits of armies; if at a mountain gate, tests taboos; if within a kaidan, returns as a name.

Baekgwi Jeonseunggi is a book for reading that difference.

#Law - The Usage System of This Book

All data and variants in this volume are laid on top of the co Yoma Bestiary. The Wounds, Defense, Energy, and Domination of existing yoma follow the original text first, and fc08 adds values and rules only in the following four cases.

CaseHandling
Era variantThe mood and small adjustments of Heian, Sengoku, Edo, and the modern age.
Place variantPlace gimmicks such as battlefield, mountain road, well, warehouse, and station.
Enhancement backgroundName, domain, gate, retinue, kaidan proliferation, and human contract.
Yoma PCConverting existing yoma techniques downward into PC class traits.

#Operation - Reading by Chapter

fc08 is structured to be read in stages: quick yoma incidents, Sengoku placement, data variants, long-term adversaries, and the operation of yoma companions and PCs. You may pick and use only the chapters you need, but for yoma PCs and technique conversion, always read chapter 07 together.

NeedWhere to Read
Quick yoma incidentChapters 01 and 02
Sengoku placementChapter 03
Era variantChapter 04
Data variantChapter 05
Long-term adversaries and organizations06-02, 06-03
Yoma companions and PCs07-02, 07-03, 07-04

#Meta Card

ItemValue
Seriesfc Volume 08
TitleBaekgwi Jeonseunggi (百鬼傳承記)
CharacterYoma commentary + kaidan operation + variant data + yoma organization / companion / PC support
Central eraSengoku
Supporting erasHeian, Edo, modern
Dependenciesco required / fc02, fc04, fc07, ex3 referenced
AuthorityData Catalog (yoma data) + Campaign Module (yoma PC / companion rules) + Reference Only (kaidan commentary)
Current versionv1.3.1 (fc08-VERSION)

#Production and AI Notice

ItemContent
CreatorShellman
Inquiries and FeedbackX (formerly Twitter) @ds62hg, @trpg_ds62
Generative AI Usage NoticeA substantial portion of this material was produced with the assistance of generative AI (LLM) during the planning, drafting, sentence-editing, and proofreading processes. The GPT Image 2 model was used during the image generation process. Claude Code and Codex were used for the Japanese and English translations. Final editing and responsibility for publication lie with the creator. In the event of domestic or international legal changes regarding AI-assisted works, the relevant laws shall apply.
LicenseUnless otherwise noted, distributed under CC BY-NC-SA 4.0.

#Scope Declaration

This volume covers the following.

  • What yoma are.
  • What yoma want.
  • What the Gate of the Spirit Realm is to yoma.
  • How the major factions of co deal with yoma types.
  • How to turn kaidan into scenes, clues, combat, negotiation, and follow-up consequences.
  • The ecology of Sengoku yoma and the operation of yoma on battlefields, castles, villages, mountain roads, temples, rivers, and seas.
  • Heian archetypes, Edo kaidan forms, and modern-yoma forms of variants.
  • Era-based and trait-based variant data for existing yoma.
  • Backgrounds for handling yoma more powerfully, and yoma masterminds.
  • Original yoma organizations.
  • How to use yoma as companions, accompanying squads, the yoma PC generic class, and technique conversion.

This volume does not cover the following.

  • A full replacement of the canonical values in the co Yoma Bestiary.
  • A complete cataloging of every Japanese yokai and urban legend.
  • Direct duplication of characters proper to real-world kaidan or modern creative works.
  • Interpretations that blame yoma for the causes of human wars.
  • The removal or replacement of the hanyo class.

#Structure of the Book

#00. Meta

#01. The Nature of Yoma

#02. The Flavor of Kaidan

#03. Sengoku Yoma

#04. Era Variants

#05. Hundred-Demons Data

#06. Enhanced Yoma

#07. Yoma Companions and Yoma PCs

#99. Reference

#Connections with Other Volumes

VolumeConnection Point
coThe standard for the Yoma Bestiary, hanyo, factions, and combat / squad rules.
fc02Reference when reinforcing the air of Sengoku-era yoma incidents, the reactions of commoners, and the sense of the Spirit Realm opening.
fc04Reference when handling Heian-archetype yoma, the Night Parade of a Hundred Demons, Onmyodo, and Tamamo-no-Mae-lineage variants.
ex3Reference when handling Edo kaidan-form yoma, the Hundred-Tale Society, the shogunate's concealment system, and yoma organizations.
fc07Reference when distinguishing fiends and yoma, dark-side organizations and yoma organizations, and the boundary between villain play and yoma PCs.
fc01Reference when judging the boundary of divinity, tatari, and yoma, or when handling cases where a yoma was deified.

#Closing Words

"Before you cut down a yoma, listen to where its name came from."

Yoma do not come only from the night. They come to every place where people have given their fear a name.