Domain Expansion in Japanese: 領域展開 and All the Domains

How to Say "Domain Expansion" in Japanese

領域展開 (ryōiki tenkai) is the direct answer to how "domain expansion" sounds in Japanese: 領域 means "domain, territory," and 展開 means "unfolding, deployment." Together they give the bureaucratically precise "unfolding of a domain" — the English "expansion" only roughly conveys that meaning.

Why "Expansion" in English

The English translation of Jujutsu Kaisen settled on the word "expansion," though 展開 is closer to "unfolding" or "unfurling" — the way military and business terms like "deployment of troops" are rendered. "Expansion" sounds clearer to a viewer who can't see the original characters, but it shifts the meaning a little: it's not that the domain gets bigger, but that the sorcerer unfolds their own space around themselves.

All the Domains of Jujutsu Kaisen in Japanese

A domain in Jujutsu Kaisen is an enclosed space that a sorcerer unfolds around themselves by force of will: inside it, the sorcerer's own technique lands without fail, and there is no ordinary way out of a completed barrier. Every character with a domain expansion has their own name for it, and almost always it is built from the language of Buddhist terms.

Buddhist Words in the Names

Half the names in the table are built on Buddhist vocabulary, not on words invented for the anime. 無量 ("immeasurable") and 空 ("void") are basic Buddhist concepts, familiar from the name of Amida Buddha and the teaching of śūnyatā. 円頓 is a term from the Tendai school for sudden and complete enlightenment, 胎蔵 is the "womb realm" of esoteric Buddhism, one of the two mandalas of the Shingon tradition, and 鉄囲山 is Mount Iron Ring, the ring of mountains at the very edge of the Buddhist worldview.

領 — The Character of Territory

領 — значение: territory, domain, to govern — онъёми: リョウ — кунъёми: えり — 14 штрих(ов). 領 — "to own, to govern": the same character stands in the very term 領域展開 (ryōiki tenkai), "domain expansion," one of the main techniques of Jujutsu Kaisen.

領 means "to own, to govern." The same character appears in 領土 (ryōdo, "national territory"), 領域 (ryōiki, "domain, sphere"), 大統領 (daitōryō, "president"), and 要領 (yōryō, "the gist, knack").

Why "President" Is Written with the Same Character

大統領 (daitōryō, "president") is made of 大 "great" and 統領 "to lead, to command," and 統領 contains the same 領 as "territory." Both a head of state and a sorcerer's domain rest on one character — "to own, to govern."

Write 領 along the guides — the character of "territory" that stands both in "domain expansion" and in the word "president."

Gojō's and Sukuna's Domains: Void and Sanctuary

無量空処 is Gojō Satoru's domain: 無量 means "immeasurable," 空処 is "empty place," and together they give "boundless void": the opponent is flooded with an infinite stream of information and cannot move. 伏魔御廚子 (fukuma mizushi) is Sukuna's domain: 伏魔 is "lurking demons," and 御廚子 is a "butsudan," a carved cabinet with two doors for keeping a Buddha statue.

How Sukuna Names His Domain

Sukuna calls his regular technique 御廚子 (mizushi), and the domain expansion based on it is 伏魔御廚子: the prefix 伏魔 was simply added to the existing name of the technique. This is a rare case in Jujutsu Kaisen where the technique itself and the domain based on it share the same root in their names.

FAQ

How do you say "domain expansion" in Japanese?

領域展開 (ryōiki tenkai) — Jujutsu Kaisen uses exactly this term: 領域 means "domain, territory," and 展開 means "unfolding." The English translation settled on the loose "expansion," though closer to the original would be "unfolding one's own domain around oneself."

What does 領域展開 translate to literally?

Literally, 領域 is "domain, territory," and 展開 is "unfolding, deployment": together they give the bureaucratically precise "unfolding of a domain." It is not a battle cry but a compound word from ordinary business vocabulary that was simply applied to a magical technique.

What is Gojō's domain expansion called in Japanese?

Gojō Satoru's domain expansion is called 無量空処 (muryō kusho): 無量 is "immeasurable," 空処 is "empty place." Together — "boundless void": the opponent is flooded with an infinite stream of information and cannot move.

What is Sukuna's domain expansion called?

Sukuna's domain is called 伏魔御廚子 (fukuma mizushi): 伏魔 is "lurking demons," 御廚子 is a "butsudan," a carved cabinet for a Buddha statue. The name is built on the name of his regular technique 御廚子, to which the prefix 伏魔 was simply added.

Whose domain expansions are there in Jujutsu Kaisen?

Domain expansions in Jujutsu Kaisen belong to Gojō Satoru (無量空処), Ryōmen Sukuna (伏魔御廚子), Okkotsu Yūta (真贋相愛), Jōgo (蓋棺鉄囲山), Mahito (自閉円頓裹), Hiromi Higuruma (誅伏賜死), and Hakari Kinji (坐殺博徒) — and the list of characters doesn't end there.

Why are there so many Buddhist words in the domain names?

Half the names in the table above are built on Buddhist terms, not on words invented for the anime. 無量 and 空 are basic concepts from the teaching of śūnyatā, 円頓 is a term from the Tendai school for sudden enlightenment, and 胎蔵 is the "womb realm" of esoteric Shingon Buddhism.

Sources

• Kotobank: 鉄囲山 (Mount Iron Ring)
• Kotobank: 胎蔵界 (esoteric Shingon Buddhism)
• Japanese Wikipedia: 呪術廻戦