English edition v1.3.3 · fc-index

#Sando Shinkyo (三道心鏡) — Comprehensive Overview

Contents

Mind-Mirror of the Three Ways cover

Fiction-Only + RP Guide. This volume adds no new rules. There is no new Sorcery, no new school, no new class, no new data card. It is a commentary for better speaking and playing the faith, Three Ways and Six Hearts, and classes of co that already exist.

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


#Opening Words

The blade of the Sengoku era did not come out of empty air.

The one who gripped the blade thought of his lord. That was the word of Confucianism (儒). He recited sutras for the dead. That was the word of Buddhism (佛). He sought the one breath in which the blade-tip does not tremble. That was the word of Zen (禪). He entrusted his body to the flow of mountain and star and wind. That was the word of xian (仙).

At the table of Konsei Reiyotan it is the same. When a samurai speaks of loyalty, when an esoteric monk speaks of compassion, when a shugenja speaks of austerity, when a Pure Land Monk speaks of the nembutsu, when an onmyoji speaks of the principle of nature — behind those words lies an old stratum of thought and faith.

This volume is a book for reading that stratum.


#Introductory Fragment — Four People Before the Mirror

Four people before a mirror, only their upper silhouettes reflected differently, mirror surface pure white, philosophical unease without text.

On a rainy night, four people gathered in the guest room of an old temple. The samurai dried his wet order document and laid it on the tatami, the monk turned his prayer beads one by one, and the ronin gazed at his cold teacup. The hermit who had come down from the mountain left the window open a little and was counting the stars between the clouds.

"The order is plain," said the samurai. "I was commanded to empty the village and break the bridge."

The monk raised his head. "Beyond the bridge there are still people who have not even held a funeral. An order is the word of the living, resentment is the word of the dead. Which of the two will remain longer?"

The ronin turned his teacup. "When there are many words, the blade comes late," he said quietly. "But today it seems all right to come late. I still cannot see who the enemy is."

The hermit laughed. "It is not a person who breaks the bridge. The river is already changing its course. The stars and the water say the same thing, yet only humans say things different from one another."

In the bronze mirror set at the center of the room, the four faces were reflected together. No one could look straight at his own face. That night, the Sando Shinkyo gave no answer. It only showed, for each, with what words he would endure his own choice.

#Meta Card

ItemValue
Seriesfc (Focus Series) Volume 06
TitleSando Shinkyo (三道心鏡)
CharacterHistory · worldbuilding commentary + RP support
SubjectThe Confucianism, Buddhism, Zen, and xian thought of Japan from the Sengoku to the Edo period
Dependenciesco recommended / parallel reading with fc02 recommended
AuthorityFiction-Only + RP Guide
Relationship with the main volumeCommentary support for Three Ways and Six Hearts and the Faith of the Sengoku
Current versionv1.3.1 (fc06-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.

  • Real history: how Confucianism, Buddhism, Zen, and xian thought operated in Japan from the Sengoku to the Edo period.
  • Konsei Reiyotan standard: how, in a world where yoma are real, this thought takes on a more direct meaning.
  • RP support: how to enrich the Three Ways and Six Hearts, the religious classes, and the speech and choices of samurai, scholar, kuge, and Commoner.

This volume does not cover the following.

  • additional Sorcery
  • additional schools
  • additional classes
  • new combat values
  • historical-paper-style precise verification

#An Important Distinction — Zen (禪) and xian (仙)

The Three Ways and Six Hearts of co take Confucianism (儒), Buddhism (佛), and xian (仙) as the roots of the Three Ways. Among them, the xian of the Way of Mystery (玄道) is , that is, the lineage of Daoism, Shinto, and natural spirituality.

The Zen treated separately in this volume chiefly means , that is, the practice culture of Zen, zazen, and no-mind. Zen is historically one current within Buddhism. Therefore the Zen (禪) of this volume, while being inside the Way of Emptiness (空道), often borders on the language of no-mind (無心), Truth (眞), and the Way of Mystery (玄道).

This distinction is important.

CharacterReadingMeaning in this volumeRelationship with the co Three Ways and Six Hearts
JuConfucianism · Confucian learning · Neo-Confucianism · loyalty-filial-piety-ritesthe root of the Way of Rites (禮道)
ButsuBuddhism in general, including Pure Land, esoteric, and Shugendothe root of the Way of Emptiness (空道)
ZenZen, zazen, no-mind, the practice language of warrior cultureinside the Way of Emptiness + contact with no-mind · Truth
SenDaoism · Shinto · natural spirituality · the xian-like worldviewthe root of the Way of Mystery (玄道)

#Structure of the Book

#00. Meta

#01. Era and Map

#02. The Four Currents

#03. RP Commentary

#04. Konsei Reiyotan Operation

#99. Closing Words


#Connection with Other Volumes

If fc02 is a book that broadly illuminates the people and folkways of the Sengoku era, then fc06 is a book that digs into what those people believed to be right.

fc02 Sengoku Folkwaysfc06 Sando Shinkyo
Centerera · people · yomathought · faith · heart
CharacterScent (香) reading materialScent + RP support
Rulesnoneno new rules
Main usethe mood of the eraThree Ways and Six Hearts · class RP · NPC motive
Question"What kind of place is that era?""What does that person believe?"

VolumeConnection point
coThe standard for the Three Ways and Six Hearts, faith, and religious-class RP.
fc02Reference when reinforcing the people and folkways of the Sengoku era with the language of conviction.
ex3Reference when treating the Edo Confucian order, temple registration, and the language of status and law.
fc07Reference when the same Three Ways and Six Hearts lean toward the dark side and the way of evil.
fc08Reference when treating how the desire of yoma, ghost stories, and human belief mesh together.

#One-Line Invitation

"Before you take up the blade, ask what that blade serves."


The mirror that reflects the heart gives no answer — it shows only the hand that took up the blade, clearly.