#Domains — What You Can and Cannot Do

Contents

Canon — fc01 domain rules. Nearly every effect of a divinity works through a "domain." In a realm where no domain applies, divinity does not function.

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#Scent — A God Is a God Only Within Its Own Realm

Amaterasu is the sun. Thus, in the matter of the sun's rising and setting, her word is law. But the moment she sets foot in Yomi, she is not the sun — that is Izanami's seat. In that dark land, light is snuffed out instead.

Susanoo is the storm. Thunder and rain are his. But making rice grow is Inari's work, and healing sickness is Okuninushi's work. Each has its own seat.

This "seat" is called a domain. A domain is a god's name, its limit, and its promise.

"He who calls a god outside its seat receives absence as his answer."

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#Law — What a Domain Is

A domain is the concrete realm that a god governs.

#Notation Rules

• Write it as a single noun phrase.
• It must be concrete.

#Good Domains (Concrete)

• The sun
• Storm · sea
• Grain · foxes
• War · archery
• Yomi (the land of the dead)
• The forge fire

#Bad Domains (Abstract · Forbidden)

• Nature (too broad → needs subdivision)
• Life (its meaning is effectively omnipotence)
• Good (善) / evil (惡) (moral abstractions)
• The power to win (result-designating — it intrudes on every check)
• Everything (not a domain to begin with)

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#Law — Domain Count Cap (Canon)

Domains exceeding the cap are not permitted. Even an Imperial God has only up to 5. This is the 1st device against omnipotence.

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#Scent — The Boundary of a Domain

"I am the sun. But in a place where the sun does not rise, who am I?" — said to be the words Amaterasu spoke before entering the heavenly rock cave.

Outside its domain, a divinity grants no bonus. This limit is precisely the sentiment of Japanese myth — each guards what is its own, yet does not carelessly step into what belongs to another.

Even the gods' battles occur only along the boundary lines of domains. Susanoo rampages against Amaterasu, but he could not extinguish the sun. He merely drove her into the cave.

#Law — Provisions Outside a Domain

Divinity effects do not apply to checks outside a domain. No exceptions.

Examples:

• Amaterasu (sun · imperial authority · ancestral divinity · weaving · rice) → divinity does not apply to a Yomi check. That is Izanami's realm.
• Susanoo (storm · sea · hero · the ritual sword) → divinity does not apply to a grain-related check. That is Inari's realm.
• The hearth god (the hearth fire) → divinity does not apply to a wildfire check. Outside the hearth is not his seat.

Judging "an adjacent realm": Does Amaterasu's "sun" reach even the sunlight on the coast? Does it fall under Okuninushi's "Izumo" realm? Such gray zones are to be decided once by the GM and held consistent within the session — do not change them.

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#Law — Domain Conflicts Between Gods

When two gods' domains overlap:

1. The higher divinity takes precedence. (Divinity 5 > 4 > 3 > ...)
2. If the divinity is equal, the narrower domain takes precedence in that scene.

• Example: Both are divinity 4. One holds "the sea at large," the other "the Tsushima Strait." → Within the Tsushima Strait, the latter takes precedence.

1. For equal divinity · equal breadth, the tiebreaker is the distance and scale of the shrines that receive offerings. The nearer and larger one takes precedence.

When domains do not overlap, there is no interaction between them. Susanoo's storm cannot cancel Okuninushi's healing.

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#Scent — When a Check Enters a Domain

"The moment you drew your blade, in whose seat did you stand?"

Just before a player rolls a check, the GM pauses once to think. In whose land is this check being made right now? An ordinary field — the lesser god of the fields. The seashore — the sea god. Inside a shrine — that shrine's principal deity.

When a god takes interest in that check, divinity opens. In matters of no interest to it, a god does not intervene.

#Law — Judgment Order for In-Domain Checks

1. The player/GM states the core task of the check in a single sentence.

• Example: "Part the mist with this sunlight."

1. Does that task clearly fall under one of the entries in the god's domain list?

• Example: Amaterasu's domain "the sun" → it falls under ✓

1. If ambiguous, treat it as not falling under. (The 2nd device against omnipotence.)

Only one domain is laid on a single check. Even if several domains are involved at once, the GM selects the single one closest to the core.

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#Law — Ban on Inter-Domain Interference (Canon)

No god may lay divinity effects on a check outside its own domain. No exceptions.

Examples of being "related, but outside the domain":

• For Amaterasu to intervene in Yomi, "Izanami's realm" must be among her domains — without it, impossible.
• For Hachiman to intervene in grain abundance, "agriculture" must be in his domains — without it, impossible (in the actual myths, Hachiman is not an agricultural god).

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#Scent — Expansion and Contraction of a Domain

A god's realm is not fixed. The more people worship it, the more its realm swells; when people forget, it shrinks. When a shrine's lamps go out and its priest dies, within a few years that god has grown smaller by that much.

#Law — Domain Change Rules

A domain list is fundamentally a fixed value. However, it can change through narrative events:

All changes come only through narrative events. By a check, impossible.

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#Law — Summary

1. A domain = a single concrete noun phrase.
2. The domain count is within the divinity rank cap.
3. Outside its domain, it is not a god.
4. When domains overlap, the higher divinity takes precedence; if equal, the narrower one.
5. If ambiguous, treat it as not falling under.

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#Scent — In One Sentence

"A domain is a god's name, its limit, and its promise."